Data & Statistics

Problem 2101

14 123 Defaul... B A B5:B8 fx 100\% \ $\% .0$ \xrightarrow{00}I5 \frac{2}{2}$ 17 B A Answer Note: your answers ca decimals or percentage Question
You roll a fair, 5 -sided die. What's the probability you will roll a 3? A bag contains a bunch of marbles: 13 red, 10 green, and 4 yellow. What's the probability of randomly picking a green marble? A bag contains a bunch of marbles: 13 red, 10 green, and 4 yellow. What's the probability of randomly picking a yellow marble? A bag contains a bunch of marbles: 13 red, 10 green, and 4 yellow. What's the probability of randomly picking a red OR green marble? Imagine a spinner with every number (in order) from 1 to $\mathbf{2 0}$ . What are the chances it will land on a multiple of 3 ? (that means 3 or 6 or 9 or 12 or 15 or 18) Imagine a spinner with every number (in order) from 1 to 20 . What are the chances it will land exactly on the number I'm thinking of? Imagine a spinner with every number (in order) from 1 to $\mathbf{2 0}$ . What are the chances it will land within one tile (on either side) of the number l'm thinking of? Imagine a spinner with every number (in order) from 1 to 10. What are the chances it will land within two tiles (on either side) of the number l'm thinking of? Imagine a spinner with every number (in order) from 1 to $\mathbf{3 0}$ . What are the chances it will land within three tiles (on Level1 - Level 2 . Level 3 -

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Problem 2102

the interest earned at account's maturity (in 18 years from opening).
7. Currently, the density of Earth's human population $D$ is about 65 people per square kilometre, or about 1 person per 15,384 square metres. The current population growth rate $p$ is about 1 percent per year (This roughly corresponds to every family having on average three children.). Find the population density expected in one thousand years from now if the growth rate does not change.

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Problem 2103

Each of 7 students reported the number of movies they saw in the past year. This is what they re $10,14,8,9,5,17,14$
Find the mean and median number of movies that the students saw. If necessary, round your answers to the nearest tenth. (a) Mean: $\square$ movies (b) Median: $\square$ movies

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Problem 2104

For each system listed in the first column of the table below, decide (if possible) whether the change described in the second column will increase the entropy $S$ of the system, decrease $S$ , or leave $S$ unchanged. If you don't have enough information to decide, check the "not enough information" button in the last column. Note for advanced students: you may assume ideal gas and ideal solution behaviour. \begin{tabular}{|l|l|l|} \hline \multicolumn{1}{|c|}{ System } & \multicolumn{1}{c|}{ Change } & \multicolumn{1}{c|}{ $\Delta S$ } \\ \hline 20. I of pure carbon dioxide $\left(\mathrm{CO}_{2}\right)$ \end{tabular} $|$ \begin{tabular}{l} The gases are mixed, with the \\ gas and 20.0 L of pure krypton \\ (Kr) gas, both at I atm and $14^{\circ} \mathrm{C}$ . \end{tabular}

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Problem 2105

Imagine a spinner witi every number (in order) Trom I to 20. Wifat are the chances it willand whinin one tone (on either side) of the number l'm thinking of? Imagine a spinner with every number (in order) from 1 to $\mathbf{1 0}$ . What are the chances it will land within two tiles (on either side) of the number l'm thinking of? Imagine a spinner with every number (in order) from 1 to $\mathbf{3 0}$ . What are the chances it will land within three tiles (on either side) of the number l'm thinking of? Imagine a spinner with every number (in order) from 1 to $\mathbf{1 0}$ . What are the chances it will land within four tiles (on either side) of the number l'm thinking of? Imagine a spinner with every number (in order) from 1 to 10 . What are the chances it will land within five tiles (on either side) of the number I'm thinking of? Imagine a spinner with every number (in order) from 1 to $\mathbf{2 0}$ . What are the chances it will land within six tiles (on either side) of the number I'm thinking of? magine a spinner with every number (in order) from 1 to $\mathbf{1 0 0}$ . What are the chances it will land within eighteen tilk (on either side) of the number l'm thinking of?

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Problem 2106

For each system listed in the first column of the table below, decide (if possible) whether the change described in the second column will increase the entropy $S$ of the system, decrease $S$ , or leave $S$ unchanged. If you don't have enough information to decide, check the "not enough information" button in the last column.
Note for advanced students: you may assume ideal gas and ideal solution behaviour. \begin{tabular}{|c|c|c|} \hline System & Change & $\Delta S$ \\ \hline A solution made of potassium chloride $(\mathrm{KCl})$ in water, at $80^{\circ} \mathrm{C}$ . & 50. mL of pure water is added to the solution. & $\Delta S<0$ $\Delta S=0$ $\Delta S>0$ not enough information \\ \hline A mixture of krypton $(\mathrm{Kr})$ gas and xenon ( Xe ) gas at 2 atm and $47^{\circ} \mathrm{C}$ . & An additional 2.0 L of pure Xe gas is added to the mixture, with the pressure kept constant at 2 atm . & $\Delta S<0$ $\Delta S=0$ $\Delta S>0$ not enough information \\ \hline 1.0 g of potassium chloride $(\mathrm{KCl})$ and 2.0 L of pure water at $80^{\circ} \mathrm{C}$ , & The potassium chloride is dissolved in the water. & $\Delta S<0$ $\Delta S=0$ $\triangle S>0$ not enough information \\ \hline \end{tabular}

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Problem 2107

For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy $\Delta S_{\text {rxn }}$ . If it's not possible to decide with the information given, check the "not enough information" button in the last column. Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal. \begin{tabular}{|c|c|} \hline reaction & sign of reaction entropy \\ \hline $2 \mathrm{C}_{2} \mathrm{H}_{6}(\mathrm{~g})+7 \mathrm{O}_{2}(\mathrm{~g}) \rightarrow 4 \mathrm{CO}_{2}(\mathrm{~g})+6 \mathrm{H}_{2} \mathrm{O}(\mathrm{g})$ & $\Delta S_{\mathrm{rxn}}<0$ $\Delta S_{\mathrm{rxn}}>0$ not enough information. \\ \hline $\mathrm{H}_{2} \mathrm{SO}_{4}(l)+\mathrm{H}_{2} \mathrm{O}(l) \rightarrow \mathrm{H}_{3} \mathrm{O}^{+}(a q)+\mathrm{HSO}_{4}^{-}(a q)$ & $\Delta S_{\mathrm{rxn}}<0$ $\Delta S_{\mathrm{rxn}}>0$ not enough information. \\ \hline $\mathrm{MgCl}_{2}(\mathrm{~s})+\mathrm{H}_{2} \mathrm{O}(l) \rightarrow \mathrm{MgO}(\mathrm{s})+2 \mathrm{HCl}(\mathrm{g})$ & $\Delta S_{r x n}<0$ $\Delta S_{r \times n}>0$ not enough information. \\ \hline \end{tabular}

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Problem 2108

Question
You roll a fair, 5 -sided die, then you flip à coin. How many different potential outcomes are there? In the example above, how likely is it that you will roll a 5 and then flip Tails? In the same scenario, how likely is it that you will roll a number bigger than 1 and then flip Heads? In the example above, how likely is it that you will roll an odd number and then flip either Heads or Tails? You roll a pair of 6-sided dice. The total number of possible outcomes is: In this scenario, what is the probability that you rolled a 3 on the first die, and a 4 on the second die? In the same scenario, what is the probability that you rolled an even number on the first die, and an odd number on the second die? In the same scenario, what is the probability that you rolled a 2 or 3 on the first die, and a 6 on the second die? In the same scenario, what is the probability that you rolled a number bigger than 4 on the first die, and a number

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Problem 2109

Read the descriptions of physical or chemical changes in the table below. Then decide whether the change will be spontaneous, if you can. \begin{tabular}{|l|l|} \hline Change & Is this change spontaneous? \\ \hline \begin{tabular}{l} During an exothermic chemical reaction, four moles of gaseous reactants are \\ turned into two moles of gaseous products. \end{tabular} & Yes. \\ \hline A gas condenses to a liquid, releasing heat. & Nos. \\ \hline \end{tabular}

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Problem 2110

\text{Warm-Up} \\ \text{Click on the blocks to build your own bag.} \\
\text{Make the probability of picking a green block (G) 40\%.} \\
\text{The user took a picture with their phone and the text was extracted above. The user then had a dialogue with an AI Assistant to help clarify the instructions.} \\
\text{Dialogue Transcript:} \\
\text{Hello! It seems like you're working on a probability problem where you need to configure a bag of blocks such that the probability of picking a green block is 40\%. To help you out, I'll need a bit more information:} \\
\text{- How many blocks in total do you want in the bag?} \\ \text{- Are there other colors of blocks available and if so, how many types?} \\
\text{Once you provide this information, I can guide you on how to set up your blocks to achieve the desired probability.} \\ \text{There are 20 blocks} \\

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Problem 2111

What is the probability of selecting a random month of the year and getting a month that starts with the letter "J"?
If you get stuck, consider listing the sample space. Submit

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Problem 2112

Problem 2 $4-40$
A bag has 6 blocks in it.
Joel picks a block out of the bag 60 times. He gets a green block 43 times.
Based on these results, how many blocks do you expect to be green? $\square$ Submit and Explain

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Problem 2113

A local fast-food restaurant is running a "Draw a three, get it free" lunch promotion. After each customer orders, a touch-screen display shows the message, "Press here to win a free lunch." A computer program then simulates one card being drawn at random from a standard deck of playing cards. If the chosen card is a 3, the customer's order is free. (Note that the probability of drawing a 3 from a standard deck of playing cards is $4 / 52$ .) Otherwise, the customer must pay the bill. Suppose that 250 customers place lunch orders on the first day of the promotion. Let $X$ $=$ the number of people who win a free lunch. Explain why X is a binomial random variable. B- choose your answer... $\square$ "failure"=Anything but a type your answer... $\square$ - "success"=Draw a type your answer... $\square$ $\qquad$ - Knowing whether or not one person gets a type your answer... $\square$ tells you choose your answer... $\square$ about whether or not $1-$ choose your answer... $\square$ another person gets a type your answer... $\square$ N- $\square$ $-n=$ type your answer... $\square$
S- $\square$ $p=$ type your answer... $\square$

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Problem 2114

Which of the following ara the two quartitios whase functional relationship is dascribod in the given graph? (1 point) The two quantities are the average rairtall in inches and the yoars. The two quantilies are inches and monthe of the year. The two quartitics are the $x$ -values and the $y$ -values. The two quantitics are the avsrago rairiall in inches and the month of the yoar.

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Problem 2115

Considar the givan graph. Analyze the irtorvals during tha months from Jure to Docambor and doscriba how that corrospands so the anorago raintall. (1 paint) the average raintall increases then docreases the avorage raintall increases the avorage raintal romalne constart the avorage raintall docroases

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Problem 2116

a group of tects lest wibhth wes 28 with a rengs ond standerd Geviction belowt the meshilhow manny clathe clowntload? 25
31
23

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Problem 2117

Which of the following relations represent functions? Select all that apply.
\begin{tabular}{|c|c|c|c|c|c|} \hline $x$ & -2 & -1 & 0 & 1 & 2 \\ \hline $y$ & 3 & 3 & 3 & 3 & 3 \\ \hline \end{tabular}

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Problem 2118

The Virginia Cooperative Extension reports the mean weight of yearling Angus steers is 1152 lbs. Suppose the standard deviation is 84 lbs . How many standard deviations from the mean would a steer weighing 1000 lbs be? 0.6190 1.8095 $-1.8095$ $-0.6190$

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Problem 2119

silt Clessmok for Ifs. Dats E! What dås bith rete rear TDSE Eoalmari:s Top 50 Wellness Qu. Displaying Screens.. biennials, and perennials. Distribution of plant types 13 Time elapsed 00 21 06 HR MIN SEC SmartScore out of 100 60
If the nursery has a total of 150 plants, how many more annuals than perennials does it have? $\square$ Submit Work it out Not feeling ready yet? These can help:

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Problem 2120

A building supply manufacturer tracked its annual proauction revers. Annual sales
Which item did the manufacturer produce the most of? brackets nuts screws nails

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Problem 2121

Question
The tables shows the linear relationship between the balance of Bill's bank account and the $n$ umber of days since he was paid. \begin{tabular}{|c|c|c|c|c|} \hline Days & 0 & 4 & 6 & 17 \\ \hline Dollars & 800 & 544 & 46 & 96 \\ \hline \end{tabular}
Answer Attempt 1 out of 2
What was the rate of change of Bill's account balance in dollars per month?

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Problem 2122

Question
The table shows the linear relationship between the temperature of Earth's atmosphere and the altitude above sea level. What was the rate of change of the temperature with respect to altitude? \begin{tabular}{|c|c|} \hline \begin{tabular}{c} Altitude \\ $(\mathrm{km})$ \end{tabular} & \begin{tabular}{c} Temperature \\ $\left({ }^{\circ} \mathrm{C}\right)$ \end{tabular} \\ \hline 1 & 8.5 \\ \hline 4 & -11 \\ \hline 5 & -17.5 \\ \hline 7 & -30.5 \\ \hline \end{tabular}

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Problem 2123

Tep 50 melliress 61 twerdentg Scieers.
A puzzle book company polled its readers about their favourite type of puzzles.
Puzzle preference
If 220 readers were polled, how many more of them selected crosswords than Sudokus? $\square$ readers Submit Next up Done for now? Tru these next:

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Problem 2124

Question
The table shows the linear relationship between the balance of Bob's savings account and the number of months he has been saving. \begin{tabular}{|l|c|c|c|c|} \hline Months & 0 & 3 & 7 & 9 \\ \hline Dollars & 10 & 85 & 185 & 235 \\ \hline \end{tabular}
Answer Attempt 2 out of 2
Find the rate of change of Bob's savings account in dollars and cents per month?

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Problem 2125

6. (16 points) In a random survey of 900 licensed drivers aged 16 and over, $32 \%$ of those respondents reported that they make angry gestures while driving. Use a 0.05 significance level to test the claim that among licensed drivers aged 16 and over, the percentage who make angry gestures while driving is $30 \%$ . Identify the null hypothesis, alternative hypothesis, test statistic, critical value or P -value, and conclusion about the null hypothesis. Use the normal distribution as an approximation of the binomial distribution.

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Problem 2126

Let $X$ be a non-negative random variable with a distribution such that $P(X>a)=e^{-1.4 a}$ for all $a>0$ . Calculate $P\left(e^{X}-0.8 \leq 1\right)$ .
Answer: $\square$

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Problem 2127

The migration pattern of residents in City A, B, and C, are given by the following transition matrix. \begin{tabular}{l} \multicolumn{1}{c}{ Initial } \\ $A$ \\ $A$ \\ $B$ \end{tabular}
What does the entry in the second row first column represent? [This question is based on your assigned pre-reading/prep for the upcoming Assignment] The probability that people from City A will move to City B none of these The probability that people from City B will move to City A The probability that people from City A will move to City C.

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Problem 2128

Find the weighted estimate, $\bar{p}$ , to test the claim that $p_{1}<p_{2}$ . Use $\alpha=0.10$ . The sample statistics listed below are from independent samples $n_{1}=550, x_{1}=121$ , and $n_{2}=690, x_{2}=195$ A. 0.255 B. 1.116 C. 0.730 D. 0.338

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Problem 2129

The statements in the tables below are about two different chemical equilibria. The symbols have their usual meaning, for example $\Delta G^{\circ}$ stands for the standard Gibbs free energy of reaction and $K$ stands for the equilibrium constant.
In each table, there may be one statement that is false because it contradicts the other three statements. If you find a false statement, check the box next to it. Otherwise, check the "no false statements" box under the table. \begin{tabular}{|c|c|} \hline statement & false? \\ \hline $\ln K>0$ & O \\ \hline $K<1$ & O \\ \hline $\Delta G^{\circ}<0$ & O \\ \hline $\Delta H^{\circ}<T \Delta S^{\circ}$ & O \\ \hline \end{tabular} no false statements: \begin{tabular}{|c|c|} \hline statement & false? \\ \hline $\Delta G^{\circ}=T \Delta S^{\circ}$ & \\ \cline { 1 - 1 } $\ln K=0$ & \\ \hline $\Delta G^{\circ}=0$ & \\ \hline $K=1$ & \\ \hline \end{tabular} no false statements:

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Problem 2130

Determine whether the normal sampling distribution cain be used. The claim is $p<0.015$ and the sample size is $n=150$ . Use the normal distribution. Do not use the normal distribution.

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Problem 2131

$B=$ BINOMIAL PROBABILITY DISTRIBUTION FUNCTION
Example 4.14 In the 2013 Jerry's Artarama art supplies catalog, there are 560 pages. Eight of the pages feature signature artists. Suppose we randomly sample 100 pages. Let $X=$ the number of pages that feature signature artists. What values does $x$ take on? What is the probability distribution? Find the following probabilities: a) the probability that two pages feature signature artists b) the probability that at most six pages feature signalure arists c) the probability that more than three pages feature stonalure artists. Using the formulas, calculate the (i) mean and (ii) slandard deviation. Propared for Openstax Introduclory Statistics by River PariahnaConmunity Colleonunder CC BYSA AO

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Problem 2132

tank of water was drained at a constant rate. The table shows the number of gallons of water left rained for two amounts of time. \begin{tabular}{|c|c|} \hline Draining Time (minutes) & Water in Tank (gallons) \\ \hline 10 & 450 \\ \hline 30 & 330 \\ \hline \end{tabular}
Part A What is the rate at which the water was drained from the tank? A 11 gallons of water per minute (B) 6 gallons of water per minute (C) 45 gallons of water per minute
D 120 gallons of water per minute

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Problem 2133

Suppose $Z$ follows the standard normal distribution. Calculate the following probabilities using the ALEKS calculator. Round your responses to at least three decimal places. (a) $P(z \leq-1.18)=$ $\square$ (b) $P(z>0.77)=$ $\square$ (c) $P(-0.65<Z<2.02)=$ $\square$

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Problem 2134

\begin{tabular}{|l|l|} \hline What are the chances of them adding up to 6 or 8 ? & 0.167 \\ \hline What are the chances of them adding up to a prime number? & \\ \hline What are the chances of rolling a double (same number on each die)? \\ \hline What are the chances of rolling snake-eyes twice in a row? & \\ \hline \end{tabular}

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Problem 2135

Question 2 Robinson Co. is interested in purchasing a new delivery vehicle so it can become a subcontractor with Amazon Logistics. The vehicle would cost $\$ 75,000$ and generate delivery revenue of $\$ 30,000$ for each of the next 6 years. If Robinson Co. purchases the vehicle, it will take a loan for $\$ 60,000$ . The terms of the loan stipulate that $4 \%$ annual interest would be charged and that the loan would be repaid in 6 equal end of year payments. At the end of the 6 years, the vehicle will have a salvage value of $\$ 10,000$ . The tax rate is $40 \%$ . Assuming that the vehicle is depreciated using MACRS (5-year property class) and that Robinson Co. uses an after-tax MARR of 10\%, compute the PW and determine whether Robinson Co. should purchase the new business vehicle. ( 25 points)

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Problem 2136

The statements in the tables below are about two different chemical equilibria. The symbols have their usual meaning, for example $\Delta G^{\circ}$ stands for the standard Gibbs free energy of reaction and $K$ stands for the equilibrium constant.
In each table, there may be one statement that is false because it contradicts the other three statements. If you find a false statement, check the box next to it. Otherwise, check the "no false statements" box under the table. \begin{tabular}{|r|c|} \hline statement & false? \\ \hline $\ln K=-1$ & 0 \\ \hline $K=1$ & 0 \\ \hline $\Delta S^{\circ}=\frac{\Delta H^{\circ}}{T}$ & \\ \hline $\Delta G^{\circ}=0$ & \\ \hline \end{tabular} no false statements: \begin{tabular}{|r|c|} \hline statement & false? \\ \hline $\Delta G^{\circ}>0$ & 0 \\ \hline $\ln K<0$ & 0 \\ \hline $\Delta S^{\circ}<\frac{\Delta H^{\circ}}{T}$ & 0 \\ \hline $K>1$ & 0 \\ \hline \end{tabular} no false statements:

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Problem 2137

1. University and Community College: A Savannah at a four-year college claims that mean enrollment at four-year colleges is higher than at two-year colleges in the United States. Two surveys are conducted. Of the 35 two-year colleges surveyed, the mean enrollment was 5,068 with a standard deviation of 4,777 . Of the 35 four-year colleges surveyed, the mean enrollment was 5,466 with a standard deviation of 8,191. a. $H_{0}$ : b. $H_{a}$ : c. Test statistic: d. $P$ -value:

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Problem 2138

3. Use the bar graph to the right to determine the percent of increase in sales from the first to the second quarter.
Company A $\square$ \%

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Problem 2139

```latex Using the line graph to the right, calculate the amount and percent of increase in the employee's salary from 2005 to 2006.
The amount of the increase in the employee's salary is \ $\square$ The percent of the increase in the employee's salary is $\square$ \%. (Type a
The user took a picture with their phone and the text was extracted above. The user then had a dialogue with an AI Assistant to help clarify the instructions.
Dialogue Transcript:
Hi there! It looks like you're trying to figure out the amount and percentage increase in an employee's salary between 2005 and 2006 using a line graph. However, I can't see the actual graph or the specific salary values from 2005 and 2006. Could you please provide the salaries for those years? That way, I can help you calculate the increase and percentage. 😊 2005 is 40 2006 is 42 ```

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Problem 2140

ALL 2 2024) Kerlise Sylvestre nference Homework Question 4, 9.1.11-T HW Score: 10.94\%, 2.63 of 24 points Part 5 of 7 Points: 0 of 1 Save
A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 315 people over the age of 55,68 dream in black and white, and among 292 people under the age of 25,13 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. $\mathrm{H}_{1}: \mathrm{P}_{1}<\mathrm{P}_{2}$ $H_{1}: p_{1}>p_{2}$ $H_{1}: P_{1} \mp P_{2}$
Identify the test statistic. $z=6.21$ (Round to two decimal places as needed.) Identify the P -value. $P \text {-value }=0.000$ (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P -value is less than $\square$ reject the null hypothesis. There is $\square$ evidence to support the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. b. Test the claim by constructing an appropriate confidence interval. $\square$ The $98 \%$ confidence interval is $\square<\left(p_{1}-p_{2}\right)<\square$ . (Round to three decimal places as needed.) Clear all Check answer $12: 47$ PM 11/22/2024

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Problem 2141

The Gazelles are a professional soccer team based in a large city. At the team's home matches, children's admission is half-off. At the last home match, 23 out of every 47 attendees were children. At that match, the facilities manager took a sample of the attendees. He found that 44 of the 73 attendees in his sample were children. For the facilities manager's sample, find and write with proper notation the population proportion and sample proportion of attendees who were children. Write the proportions as decimals (not percentages) rounded to two decimal places. (a) Population proportion: (Choose one) $\nabla=$ $\square$ (b) Sample proportion: (Choose one) $\nabla=$ $\square$

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Problem 2142

A rainstorm in Portland, Oregon, wiped out the electricity in $5 \%$ of the households in the city. Suppose that a random sample of 50 Portland households is taken after the rainstorm.
Answer the following. (If necessary, consult a list of formulas.) (a) Estimate the number of households in the sample that lost electricity by giving the mean of the relevant distribution (that is, the expectation of the relevant random variable). Do not round your response. $\square$ (b) Quantify the uncertainty of your estimate by giving the standard deviation of the distribution. Round your response to at least three decimal places. $\square$

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Problem 2143

Return Next
2 Numeric 1 point
A survey found that $25 \%$ of pet owners have their pets bathed professionally than doing it themselves. If 18 pet owners are surveyed, what is the probability that no more than 6 pet owners have their pets professionally bathed? (Round answer to the third decimal)
Type your answer... Previous Next

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Problem 2144

When rolling two dice, the probability of rolling doubles is $1 / 6$ , suppose a game player roll the dice 5 times hoping to get double. What is the probability that the player gets doubles between 2 to 5 times (exclusive)? (round to the third decimal)

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Problem 2145

A test has 10 multiple choice questions each of which has four choices and only one right answer. A student decides to use a spinner with four equivalent sectors on it to randomly choose which answer to pick for each question. What is the likelihood the student gets no more than 2 of the questions correct? (Round to the third decimal)

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Problem 2146

A test has 10 multiple choice questions each of which has four choices and only one right answer. A student decides to use a spinner with four equivalent sectors on it to randomly choose which answer to pick for each question. What is the likelihood the student gets between 7 and 9 (inclusive) of the questions correct? (Round to the fourth decimal)

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Problem 2147

John tossed a coin ten times with the desire of getting tails each time. (This is representing a binomial distribution) True False

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Problem 2148

In a binomial distribution if it is expected that $56 \%$ of people will have pets then when a sample of 125 people are selected it is expected that 70 will not have pets. True False

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Problem 2149

Figure 1 $\qquad$
Figure 2 Figure 3 Figure 4 \begin{tabular}{l} \begin{tabular}{l} (a) Which data set appears to show a positive linear \\ relationship between its two variables? \end{tabular} \\ \hline (b) Which data set appears to show a negative \\ linear relationship between its two variables? \end{tabular}

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Problem 2150

iample Inference Homework Question 6, 9.1.16-T HW Score: $11.53 \%, 4.21$ or $\angle 4$ points Save Part 2 of 7 Points: 0 of 1
In a randomized controlled trial, insecticide-treated bednets were tested as a way to reduce malaria. Among 344 infants using bednets, 14 developed malaria. Among 283 infants not using bednets, 33 developed malaria. Use a 0.01 significance level to test the claim that the incidence of malaria is lower for infants using bednets. a. Test the claim using a hypothesis test. b. Test the claim by constructing an appropriate confidence interval. c. Based on the results, do the bednets appear to be effective? A. $H_{0} \cdot \mu_{1}<\mu_{2}$ $\mathrm{H}_{1} \cdot \mathrm{p}_{1}<\mathrm{p}_{2}$ D. $H_{0}: p_{1}=p_{2}$ $H_{1}: p_{1}>p_{2}$ $H_{1}: p_{1}>p_{2}$ E. $\mathrm{H}_{0}: \mathrm{P}_{1}=\mathrm{p}_{2}$ $H_{1}: p_{1}<p_{2}$
$U_{0} \cdot \mu_{1}-\mu_{2}$ $H_{1}: p_{1} \neq p_{2}$ F. $H_{0}: p_{1} \neq p_{2}$ $H_{1}: p_{1}=p_{2}$
Identify the test statistic. $\square$ (Round jo two decimal places as needed.)

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Problem 2151

Question 11 5 pts
A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statistics exam is equal to 45 minutes. The correct hypothesis statement would be $H_{0}: \mu \neq 45$ $H_{1}: \mu=45$ . $H_{0}: \mu=45$ $H_{1}: \mu \neq 45$ . $H_{0}-\mu=45$ $\mathrm{H}_{1}: \mu>45$ . $\mathrm{H}_{0}: \mu=45$ $\mathrm{H}_{1}: \mu<45 .$

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Problem 2152

BEST Completer the statement or anwers the quetion. following reaction will $K_{e}=K_{p}$ ? B) $\mathrm{H}_{2(\mathrm{~g})}+\mathrm{Br}_{2}\left(\mathrm{~g}(\mathrm{~g}) \leftrightharpoons \mathrm{CO}(\mathrm{g})+3 \mathrm{H}_{2}(\mathrm{~g})\right.$ C) $\left.\mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) \leftrightharpoons 2 \mathrm{~g}\right) \leftrightharpoons 2 \mathrm{HBr}(\mathrm{g})$ D) $\mathrm{CO}(\mathrm{g})+2 \mathrm{NO}_{2}(\mathrm{~g})$ E) $\mathrm{N}_{2}(\mathrm{~g})+2 \mathrm{H}_{2}(\mathrm{~g}) \leftrightharpoons \mathrm{CH}_{3} \mathrm{OH}(\mathrm{g})$
7. Express the equilibrium constant for the following reaction. $\mathrm{P}_{4}(\mathrm{~g})+5 \mathrm{O}_{2}(\mathrm{~g}) \leftrightharpoons \mathrm{P}_{4} \mathrm{O}_{10}(\mathrm{~s})$ A) $K=\frac{\left[\mathrm{P}_{4}\right]\left[\mathrm{O}_{2}\right]^{5}}{\left[\mathrm{P}_{4} \mathrm{O}_{10}\right]}$ B) $K=\frac{\left[\mathrm{P}_{4} \mathrm{O}_{10}\right]}{\left[\mathrm{P}_{4}\right]\left[\mathrm{O}_{2}\right]^{5}}$ C) $K=\left[\mathrm{O}_{2}\right]^{5}$ D) $K=\left[\mathrm{O}_{2}\right]^{-5}$ E) $K=\frac{\left[\mathrm{P}_{4} \mathrm{O}_{10}\right]}{\left[\mathrm{P}_{4}\right]\left[\mathrm{O}_{2}\right]^{1 / 5}}$
8. A solution is prepared by dissolving 0.23 mol of benzoic acid and 0.27 mol of potassium benzoate in sufficient water to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer soltation causes the pH to decrease only slighly. The pH does not decrease drastically because the HCl reacts with the $\qquad$ present in the buffer solution. A) $\mathrm{H}_{2} \mathrm{O}$ B) $\mathrm{H}_{3} \mathrm{O}^{+}$ O) porassium ion D) benzoic acíd E) benzoate ion
9. A 50.0 mL sample of an aqueous $\mathrm{H}_{2} \mathrm{SO}_{4}$ solution is titrated with a 0.375 M NaOH solution. The equivalence point is reached upon addition of 125.1 mL of the base. The concentration of $\mathrm{H}_{2} \mathrm{SO}_{4}$ is $\qquad$ $M$ . A) 0.234 B) 0.469 C) 0.150 D) 0.300 E) 0.938 Page 2 of 6

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Problem 2153

The table below shows the number of cakes Stella baked with respect to time. \begin{tabular}{|c|c|} \hline \begin{tabular}{c} Number \\ of \\ Cakes \end{tabular} & \begin{tabular}{c} Time \\ (hours) \end{tabular} \\ \hline 3 & 2 \\ \hline 6 & 4 \\ \hline 9 & 6 \\ \hline 12 & 8 \\ \hline 15 & 10 \\ \hline \end{tabular}
Which of the following statements gives the unit rate? A. Stella took $\frac{3}{2}$ hours for each cake. B. Stella took $\frac{2}{3}$ of an hour for each cake. C. Stella baked 3 cakes in each hour. D. Stella baked 2 cakes in each hour.

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Problem 2154

An elementary school claims that the standard deviation in reading scores of its fourth grade students is less than 4.35. Determine whether the hypothesis test is right-tailed, left-tailed, or two-tailed.

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Problem 2155

The statement represents a claim. Write its complement and state which is $\mathrm{H}_{0}$ and which is $\mathrm{H}_{A}$ . $\mu=8.1$ A. $H_{0}: \mu=8.1$ (claim); $H_{a}: \mu \neq 8.1$ B. $H_{0}: \mu \leq 8.1 ; H_{a}: \mu>8.1$ (claim) C. $H_{0}: \mu \geq 8.1$ (claim); $H_{a}: \mu<8.1$ D. $H_{0}: \mu \neq 8.1 ; H_{a}: \mu=8.1$ (claim)

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Problem 2156

Adriana wrote down how many cups of lemonade she sold in the past 5 days. Cups of lemonade sold
What is the median of the numbers? $\square$ Submit

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Problem 2157

There are two clusters in this scatter plot: one to the left of the graph and one to the right of the graph. Cluster 1 is the grouping of points to the left of the graph, and Cluster 2 is the grouping of points to the right.
Drag and drop the answers into the boxes to match the coordinates of the outlier and to match the domain and range of each cluster.
Range of Cluster 1
Domain of Cluster 2
Range of Cluster 2 $(1,12)$ $(12,1)$ Variable A: from 1 to 5
Variable B: from 2 to 7 Variable A: from 7 to 9
Variable A

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Problem 2158

Question 14 of 20 11/22/24 1:13 PM This test: 20 point(s) possible This question: 1 point(s) possible
As part of a marketing experiment, a department store regularly mailed discount coupons to 25 of its credit card holders. Their total credit card purchases over the next three months were or to the credit card purchases over the next three months for 25 credit card holders who were not sent discount coupons. Determine whether the samples are dependent or independent. independent dependent

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Problem 2159

Part 6 of 10 Points: 0.27 of 1 Save patients suffer from headaches? Assume the samples are random and dependent, and the population is normally distributed. Complete parts (a) through ( $f$ ). \begin{tabular}{|l|c|c|c|c|c|c|c|c|c|c|c|} \hline Patient & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 \\ \hline Daily headache hours (before) & 2.1 & 4.2 & 2.2 & 3.6 & 2.2 & 3.2 & 2.5 & 4.1 & 3.6 & 3.9 & 4.1 \\ \hline Daily headache hours (after) & 1.3 & 4.6 & 1.6 & 1.3 & 1.4 & 2.5 & 2.4 & 4.0 & 1.5 & 3.4 & 4.8 \\ \hline \end{tabular} (a) Identify the claim and state $\mathrm{H}_{0}$ and $\mathrm{H}_{\mathrm{a}}$
The claim is "The therapy helps to reduce the length of time patients suffer from headaches." Let $\mu_{d}$ be the hypothesized mean of the patients' daily headache hours before therapy minus their daily headache hours after it. State $\mathrm{H}_{0}$ and $\mathrm{H}_{\mathrm{a}}$ . Choose the correct answer below. A. $H_{0}: \mu_{d} \geq \bar{d}$ B. $H_{0}: \mu_{d}=\bar{d}$ c. $\mathrm{H}_{0}: \mu_{\mathrm{d}} \leq 0$ $\mathrm{H}_{\mathrm{a}}: \mathrm{H}_{\mathrm{d}}<\overline{\mathrm{d}}$ $\mathrm{H}_{\mathrm{a}}: \mu_{\mathrm{d}} \neq \overline{\mathrm{d}}$ $H_{a}: \mu_{d}>0$ D. $H_{0}: \mu_{d} \leq \bar{d}$ E. $H_{0} \quad \mu_{d} \geq 0$ F. $H_{0} \cdot \mu_{d} \neq \bar{d}$ $\mathrm{H}_{\mathrm{a}}: \mu_{\mathrm{d}}>\overline{\mathrm{d}}$ $H_{a}: \mu_{d}<0$ $\mathrm{H}_{\mathrm{a}}: \mu_{\mathrm{d}}=\overline{\mathrm{d}}$ (b) Find the critical value(s) and identify the rejection region(s). $t_{0}=2.764$ (Use a comma to separate answers as needed. Type an integer or a decimal. Round to three decimal places as needed.) Identify the rejection region(s). Choose the correct answer below. A. $\mathrm{t}<-3.169$ or $1>3.169$ B. $i<-2.764$ or $\$>2.764$ C. $1>2764$ D. $i<-3.169$ (c) Calculate $\bar{d}$ $\bar{d}=627$ (Type an integer or a decimal. Round to three decimal places as needed.) Calculate $\mathrm{s}_{\mathrm{d}}$ $\square$ (Type an integer or a decimal. Round to three decimal places as needed.)

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Problem 2160

Find the critical values, $t_{0}$ , to test the claim that $\mu_{1}=\mu_{2}$ . Two samples are randomly Submit test $\sigma_{1}^{2} \neq \sigma_{2}^{2}$ . Use $\alpha=0.05$ . $n_{1}=25, n_{2}=30, \bar{x}_{1}=16, \bar{x}_{2}=14, s_{1}=1.5, s_{2}=1.9$ A. $\pm 2.064$ B. $\pm 2.797$ $\pm 1.711$ $\pm 2.492$

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Problem 2161

```latex \text{Predict the ball's rebound height after each successive bounce if its starting height is 200 cm. Create a table with these predicted heights.}
\begin{tabular}{|c|c|} \hline \text{Bounce} & \text{Height (cm)} \\ \hline 1 & 166.4 \\ \hline 2 & 138.445 \\ \hline 3 & \\ \hline 4 & \\ \hline 5 & \\ \hline 6 & \\ \hline \end{tabular}
\text{If the ball was left to bounce uninterrupted how high ................} ```
\text{The user took a picture with their phone and the text was extracted above. The user then had a dialogue with an AI Assistant to help clarify the instructions.}
\text{Dialogue Transcript:}
\text{Hello! It looks like you have a question about predicting the rebound height of a ball. The information you've provided shows the ball starts at a height of 200 cm and gives the rebound heights for the first two bounces. However, there is missing information, and it seems the table is incomplete.}
\text{To help you further, I need to know:} \begin{enumerate} \item \text{The rebound ratio or the percentage of the height retained after each bounce.} \item \text{How many bounces you would like to calculate the height for.} \end{enumerate}
\text{Once you provide this information, I can assist you in completing the table with the predicted heights for each bounce. Looking forward to your response!}
\text{Extracted text from attached image:} \begin{tabular}{|c|c|} \hline \text{Drop Height (cm)} & \text{Rebound Height (cm)} \\ \hline 150 & 124 \\ 70 & 59 \\ 120 & 100 \\ 100 & 83 \\ 110 & 92 \\ 40 & 33 \\ \hline \end{tabular}

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Problem 2162

Kolams are a form of art created with rice flour. They represent happiness and success. The number of minutes Nyra spends making kolams each day for 7 days are listed below. $18,21,19,22,19,56,20$
Use the drop-down menus to explain whether the mean or the median is the best measure of center for describing the number of minutes Nyra spends making kolams on a typical day.

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Problem 2163

Rohan describes the dataset $16,40,39,45,20$ by calculating the spread. Which equation gives the value of the spread? (1 point) $40-16=24$ $45-20=25$ $40-20=20$ $45-16=29$

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Problem 2164

A chef is trying out a new recipe. From his past experience, it takes him a few trials to get it right. He estimates for the first 15 trials, his probability of getting the recipe right is $35 \%$ in each trial. Since it's new, every trial is considered to be independent from the other. Submit all your answers to three decimal places. (a) The chef would like to try the recipe 10 times, and he wants to add it to the menu if he gets at least 6 right. (i) What is the probability that the new recipe will be added to the menu? 0.021 (ii) What is the probability that the chef gets exactly 6 right? (b) The chef would like to try the recipe 15 times. (i) What is the probability that the chef gets exactly 6 right?

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Problem 2165

The students in a precalculus class measured each student's height and arm span, in centimeters. The students calculated a linear regression $y-a+b x$ with heights as the input values and arm spans as the output values. The given residual plot has a point labeled $P$ at coordinates $(175,23.4)$ . What does point $P$ indicate in the context?

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Problem 2166

Find the median of the data set: $56,60,60,40,60$ , $75,40,25,53,34,62,76$ (1 point)

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Problem 2167

\begin{tabular}{|c|c|} \hline Game & Runs Scored \\ \hline 1 & 0 \\ \hline 2 & 7 \\ \hline 3 & 2 \\ \hline 4 & 9 \\ \hline 5 & 1 \\ \hline 6 & 1 \\ \hline 7 & 10 \\ \hline \end{tabular}
What value, the mean or the median, best describes the shape of the data set that contains the number of runs scored by the baseball team? Choose 1 for mean and 2 for median. (1 point) $\square$

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Problem 2168

Your friend finds the mean and median of the data set: $40,38,62,70,56,41,58,48,60$ , 45. Your friend says that the mean and median are both 52 . Is your friend correct? If not, find the correct answer. (1 point) My friend is correct. My friend is not correct. The mean is 51.8 . The median is 48.5 . My friend is not correct. The mean is 51.8 . The median is 52 . My friend is not correct. The mean is 52. The median is 51.8 .

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Problem 2169

A deck of 108 cards contains an equal number of each color: red, yellow, green, and black. If a card is chosen at random, what is the probability that it is black? $\frac{1}{27}$ $\frac{1}{108}$ $\frac{1}{4}$ $\frac{1}{3}$

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Problem 2170

Numeric 1 point
When rolling two dice, the probability of rolling doubles is $1 / 6$ , suppose a game player roll the dice 5 times hoping to get double. What is the probability that the player gets doubles less than 3 times? (round to the third decimal)
Type your answer...

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Problem 2171

\begin{tabular}{|c|c|} \hline Snare Drum Backbeats & Bass Guitar Notes \\ \hline 3 & 2 \\ \hline 90 & 60 \\ \hline 120 & 80 \\ \hline \end{tabular}
Are the two quantities proportional? Explain. Use the drop-down menu to show and explain your answer. The quantities are $\square$ proportional. All the ratios of notes to backbeats are $\square$ equivalent

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Problem 2172

The following table shows the total sales, in thousands, since a new game was brought to market. \begin{tabular}{c|c|c|c|c|c|c|c|c} \hline Month & 0 & 2 & 4 & 6 & 8 & 10 & 12 & 14 \\ \hline Sales & 0 & 2.2 & 5.4 & 9.5 & 19.1 & 27.2 & 32.9 & 35.4 \\ \hline \end{tabular} (a) Plot this data and determine the point of diminishing returns.
Enter the closest value in the table.
The point of diminishing returns occurs $\square$ i $\square$ months after the game is introduced. (b) Predict total possible sales of this game, using the point of diminishing returns from the table.
Total sales $\approx$ i $\square$

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Problem 2173

```latex A sleep disorder specialist wants to test the effectiveness of a new drug that is reported to increase the number of hours of sleep patients get during the night. To do so, the specialist randomly selects 16 patients and records the number of hours of sleep each gets with and without the new drug. The accompanying table shows the results of the two-night study. Construct a $90\%$ confidence interval for $\mu_{\mathrm{d}}$ , using the inequality $\overline{\mathrm{d}}-\mathrm{t}_{\mathrm{c}} \frac{\mathrm{S}_{\mathrm{d}}}{\sqrt{n}}<\mu_{\mathrm{d}}<\overline{\mathrm{d}}+\mathrm{t}_{\mathrm{c}} \frac{\mathrm{S}_{\mathrm{d}}}{\sqrt{n}}$ . Assume the populations are normally distributed.
Calculate $d$ for each patient by subtracting the number of hours of sleep with the drug from the number without the drug. The confidence interval is $\square$ $\mathrm{hr}<\mu_{\mathrm{d}}<$ $\square$ hr. (Round to two decimal places as needed.)
The data on hours of sleep with and without the drug is as follows:
\begin{tabular}{|l|c|c|c|c|c|c|c|c|c|c|c|c|c|c|c|c|} \hline Patient & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & 13 & 14 & 15 & 16 \\ \hline \begin{tabular}{l} Hours of \\ sleep (without \\ the drug) \end{tabular} & 3.1 & 2.7 & 4.5 & 4.4 & 1.9 & 2.4 & 2.8 & 3.4 & 3.5 & 3.6 & 2.8 & 1.9 & 4.6 & 5.1 & 2.2 & 2.1 \\ \hline \begin{tabular}{l} Hours of \\ sleep (using \\ the drug) \end{tabular} & 3.8 & 4.4 & 5.4 & 6.3 & 2.6 & 3.3 & 4.1 & 5.5 & 5.3 & 5.8 & 3.5 & 4.1 & 5.3 & 6.5 & 4.6 & 4.5 \\ \hline \end{tabular} ```

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Problem 2174

Review the chart below. Graph the data by creating a bar graph. Be sure to clearly label your axes. \begin{tabular}{|l|l|} \hline \multicolumn{2}{|c|}{ Tryptophan mg per $\mathbf{3}$ oz serving } \\ \hline Turkey IVed & 190 \\ \hline Chicken & 160 \\ \hline Beef & 180 \\ \hline Peanuts & 210 \\ \hline Cheddar Cheese & 220 \\ \hline Banana & 20 \\ \hline Oats & 60 \\ \hline \end{tabular}
Tryptophan Levels among Different Foods

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Problem 2175

Use the table to find the probability. P (The degree is not a bachelor's, given that the recipient is female.)
Projected Number of Degree Recipients in 2010 (thousands) \begin{tabular}{|c|c|c|} \hline Degree & Male & Female \\ \hline Associate's & 217 & 378 \\ \hline Bachelor's & 483 & 897 \\ \hline \end{tabular}
The probability that the degree is not a bachelor's given that the recipient is female is $\square$ $\square$ . (Round to two decimal places as needed.)

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Problem 2176

Question 5 of 7
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 16 , upper bound is 26 .
The point estimate of the population mean is $\square$ .
The margin of error for the confidence interval is $\square$

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Problem 2177

Let $\times$ be a discrete random variable with the following PMF. Answer questions 1,2 and 3 $P_{x}(x)=\left\{\begin{array}{ll} \frac{1}{k} & \text { for } x=-2 \\ \frac{1}{k} & \text { for } x=-1 \\ \frac{1}{8} & \text { for } x=0 \\ \frac{1}{8} & \text { for } x=1 \\ \frac{1}{k} & \text { for } x=2 \\ 0 & \text { otherwise } \end{array}\right.$
1. (1 point) Find the value of $k$ A. 0.125 B. 0.25 C. 8 D. 1 E. 4
2. (1 point) Find $P(-1.5<x<0.5)$ A. 0.25 B. 1 C. 0.375 D. $5 / 32$ E. 0.75
3. (1 point) The $E(X)$ equals: A. 1 B. 2 C. 0 D. 0.125 E. -0.125
The discrete random variable $X$ takes the values 1,2 and 3 and has cumulative distribution function $\mathrm{F}(\mathrm{x})$ given by \begin{tabular}{|c|c|c|c|} \hline $\mathbf{X}$ & 1 & 2 & 3 \\ \hline $\mathbf{F}(\mathbf{x})$ & 0.4 & 0.4 & 1 \\ \hline \end{tabular}
4. (2 points) The variance of $X$ equals: A. 1.7 B. 0.96 C. 0.91 D. 0.98 E. 5.8 Page 217

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Problem 2178

A fine dining restaurant claims that the group sizes of their customers follows the following distribution: \begin{tabular}{|c|c|c|c} \hline 2 people & 3 people & 4 people & $4+$ people \\ \hline $36 \%$ & $10 \%$ & $17 \%$ & $37 \%$ \end{tabular}
Gustavo, a waiter at the restaurant, would like to test this claim. He takes a sample of 93 customers and records the observed frequencies in the following table: \begin{tabular}{|c|c|c|c} 2 people & 3 people & 4 people & $4+$ people \\ \hline 35 & 2 & 21 & 35 \end{tabular} (a) In performing this statistical test, state the hypotheses. - Ho: the distribution of customers for each group is the same as the observed frequencies vs. Ha: the distribution of customers for each group is not the same as the observed frequencies Ho: the distribution of customers for each group is not the same as claimed by the restaurant vs. Ha: the distribution of customers for each group is the same as claimed by the restaurant Ho: the distribution of customers for each group is the same as claimed by the restaurant vs. Ha: the distribution of customers for each group is not the same as claimed by the restaurant Ho: the distribution of customers for each group is not the same as the observed frequencies vs. Ha: the distribution of customers for each group is the same as the observed frequencies Ho: the proportions of customers for each group are all the same vs. Ha: the proportions of customers for each group are not all the same

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Problem 2179

Points: 0 of 1
Twenty members of a health club who jog were asked how many miles they jog per week. The responses are to the right. Construct a stem-and-leaf display. For single digit data, use a stem of 0 . \begin{tabular}{|l|l|l|l|l|} \hline 11 & 17 & 5 & 9 & 12 \\ \hline 26 & 20 & 31 & 15 & 6 \\ \hline 5 & 27 & 43 & 25 & 15 \\ \hline 15 & 25 & 34 & 19 & 18 \\ \hline \end{tabular}
Complete the stem-and-leaf display. $\square$ $\square$ $\square$ $\square$ $\square$ (Use ascending order.)

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Problem 2180

This question: 1 point(s) possible Submit quíz
A researcher wishes to estimate the average blood alcohol concentration (BAC) for drivers involved in fatal accidents who are found to have positive BAC values. He randomly selects records from 75 such drivers in 2009 and determines the sample mean BAC to be $0.169 \mathrm{~g} / \mathrm{dL}$ with a standard deviation of $0.010 \mathrm{~g} / \mathrm{dL}$ . Use StatCrunch to complete parts (a) through (d). A. The sample size is likely greater than $5 \%$ of the population. B. The sample size is likely greater than $10 \%$ of the population. C. The sample size is likely less than $5 \%$ of the population. D. The sample size is likely less than $10 \%$ of the population. (c) Determine and interpret a 90\% confidence interval for the mean BAC in fatal crashes in which the driver had a positive BAC.
Select the correct choice and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) A. There is a $\square$ \% probability that the population mean BAC is between $\square$ and $\square$ for drivers involved in fatal accidents who have a positive BAC value. B. The researcher is $\square$ $\%$ confident that the population mean BAC is not between $\square$ and $\square$ for drivers involved in fatal accidents who have a positive BAC value. C. The researcher is $\square$ \% confident that the population mean BAC is between $\square$ and $\square$ for drivers involved in fatal accidents who have a positive BAC value. (d) All areas of the country use a BAC of $0.09 \mathrm{~g} / \mathrm{dL}$ as the legal intoxication level. Is it possible that the mean BAC of all drivers involved in fatal accidents who are found to have positive BAC values is less than the legal intoxication level? Explain. Choose the correct answer. A. While the target value lies within the confidence interval, since it is less than the sample mean, it is unlikely that it is the true population mean. B. Not only is it possible that the population mean is not captured in the confidence interval, in this case, it is quite likely. C. Since the target value lies within the confidence interval, it is certainly a plausible value for the population mean. D. While it is possible that the population mean is not captured in the confidence interval, it is not likely.

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Problem 2181

\begin{tabular}{|c|c|} \hline What are the chances of them adding up to 7 ? & 0.167 \\ \hline What are the chances of them adding up to 6 or $8 ?$ & 0.42 \\ \hline What are the chances of them adding up to a prime number? & 0.42 \\ \hline What are the chances of rolling a double (same number on each die)? & 0.167 \\ \hline What are the chances of rolling snake-eyes twice in a row? & 0.42 \\ \hline What are the chances of the dice adding up to an even number? & 0.5 \\ \hline What are the chances that both dice will be even numbers? & 0 \\ \hline \end{tabular}

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Problem 2182

Would you Fail to Reject $\mathrm{H}_{\mathrm{O}}$ , or Reject $\mathrm{H}_{\mathrm{O}}$ and Accept $\mathrm{H}_{1}$ under the following conditions?
Critical value is 2.06 and -2.06 Test statistic is -2.09

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Problem 2183

Put the following P-values in order from weakest to strongest in terms of evidence against the statement in the null hypothesis. A. 0.013 B. 0.048 C. 0.008 D. 0.036
The correct order is $\square$ $\square$ $\square$ $\square$

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Problem 2184

The Health Department states the mean pregnancy term is 8.60 months. You conduct a study of 35 women in the Reedley area and find the mean pregnancy term is 8.68 months and a sample standard deviation of 0.2 months. Using a .01 level of significance, can you conclude that the mean pregnancy term in Reedley is different than 8.6 months?
Be sure to include all of the sections listed below. Use the picture provided to choose how your curve should look and be labeled.
State $\mathrm{H}_{0}$ and $\mathrm{H}_{1}$ . Use the picture and tell me the letter of the curve that should be used. State your critical value(s). Find the test statistic.

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Problem 2185

Sydnel Thomas $11 / 22 / 244.00 \mathrm{PM}$ Question 5 of 20 mileste20 pint(0) possiblo Thil question $\mathrm{I}_{\text {polnt(s) possib- }}$ Submil test
Find the standardized lest statistic, $L$ , to test the claim that $\mu_{1}>\mu_{2}$ . Two samples are randomly selected and come from populations that are normat. The samplo statistics are given below Aasume that $\sigma_{1}^{2} \neq \sigma_{2}^{2}$ . $n_{1}=18, n_{2}=13, \bar{x}_{1}=485, \bar{x}_{2}=470, s_{1}=40, s_{2}=25$

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Problem 2186

Guestion 8 of 80 This topti 20 pointo paspole Suborif the $\sigma_{1}^{2}=\sigma_{2}^{2}$ . Use a 0 o 0s $n_{1}=14, n_{2}=12, x_{1}=17, x_{2}=18, x_{1}=2.5,3_{2}=2.8$

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Problem 2187

\begin{table}[h] \centering \begin{tabular}{|c|c|c|c|c|c|} \hline \text{Price in Dollars} & 27 & 31 & 36 & 41 & 44 \\ \hline \text{Number of Bids} & 4 & 5 & 6 & 7 & 10 \\ \hline \end{tabular} \caption{Table of list price and number of bids for items sold through online auctions} \end{table}
Using this data, consider the equation of the regression line, $\hat{y}=b_{0}+b_{1} x$ , for predicting the number of bids an item will receive based on the list price. Keep in mind, the correlation coefficient may or may not be statistically significant for the data given. Remember, in practice, it would not be appropriate to use the regression line to make a prediction if the correlation coefficient is not statistically significant.
Step 4 of 6: Determine the value of the dependent variable $\hat{y}$ at $x=0$ .
\textbf{Answer:}
\textbf{Previous step answers:}
$b_{0}$
$b_{1}$
$x$
$y$

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Problem 2188

Use the table of $x$ - and $y$ -values below to determine the slope of the least-square $m=-0.744$ $m=127.917$ $m=-0.881$

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Problem 2189

One of the steps involved in the processing of corn flakes for cereals involves toasting the flakes. The accompanying table contains data for corn flakes thickness in millimeters for four different toasting times in seconds. Complete parts through (d) below. Click here to view the data on corn flake thickness. Click here to view a partial table of critical values of the Studentized Range, Q. a. At the 0.05 level of significance, is there evidence of a difference in the mean thickness of the corn flakes for the different toasting times?
Determine the hypotheses. Choose the correct answer below. A. $H_{0}: \mu_{1}=\mu_{2}=\cdots=\mu_{4}$ B. $H_{0}: \mu_{1}=\mu_{2}=\cdots=\mu_{3}$ $\mathrm{H}_{1}$ : Not all $\mu_{\mathrm{j}}$ are equal (where $\mathrm{j}=1,2, \ldots, 4$ ) $H_{1}$ : Not all $\mu_{j}$ are equal (where $j=1,2, \ldots, 3$ ) C. $H_{0}: \mu_{1}=\mu_{2}=\cdots=\mu_{4}$ D. $H_{0}: \mu_{1}=\mu_{2}=\cdots=\mu_{3}$ $H_{1}: \mu_{1} \neq \mu_{2} \neq \cdots \neq \mu_{4}$ $H_{1}: \mu_{1} \neq \mu_{2} \neq \cdots \neq \mu_{3}$

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Problem 2190

Describe what is misleading in the visual display of data below.
World Population, in Billions
Choose the correct answer verow. A. Time intervals on the horizontal axis do not represent equal amounts of time. B. The bars on the vertical axis curve around the globe instead of being on a straight line. C. Part of the time frame on the horizontal axis of the graph has been cut off. D. The title does not explain what is being displayed.

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Problem 2191

Fill in each blank so that the resulting statement is true. Data can be displayed using a bar graph with bars that touch each other. This visual presentation of the data is called alan $\qquad$ The heights of the bars represent the $\qquad$ of the data values.
Data can be displayed using a bar graph with bars that touch each other. This visual presentation of the data is called a $\square$ The heights of the bars represent the $\square$ of the data values.

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Problem 2192

Suppose that in 2008, 599,950 citizens died of a certain disease. Assuming the population of the country is 314 million, what was the mortality rate in units of deaths per 100,000 people?
The mortality rate is $\square$ deaths per 100,000 people. (Simplify your answer. Round to the nearest integer as needed.)

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Problem 2193

Problem 25: (5\% of Assignment Value) The same heat transfer into identical masses of different substances produces different temperature changes, due to differences in the heat capacity of the various materials. \begin{tabular}{|l|c|c|} \hline \multicolumn{1}{|c|}{ Substances } & \multicolumn{2}{c|}{ Specific heat $(c)$ } \\ \hline \multicolumn{1}{|c|}{ Solids } & $\mathrm{J} / \mathrm{kg} \cdot{ }^{\circ} \mathrm{C}$ & $\mathrm{kcal} / \mathrm{kg} \cdot{ }^{\circ} \mathrm{C}$ \\ \hline Aluminum & 900 & 0.215 \\ \hline Concrete & 840 & 0.20 \\ \hline Copper & 387 & 0.0924 \\ \hline Glass & 840 & 0.20 \\ \hline Human Body $\left(37^{\circ} \mathrm{C}\right)$ & 3500 & 0.83 \\ \hline Iron, steel & 452 & 0.108 \\ \hline \multicolumn{1}{|c|}{ Liquids } & & \\ \hline Water & 4186 & 1.000 \\ \hline Mercury & 139 & 0.0333 \\ \hline \end{tabular}
Otheexpertta.com - Part (a) $\boldsymbol{v}$
Calculate the final temperature, in degrees Celsius, when 1.25 kcal of heat transfers to 1.25 kg of water, originally at $20^{\circ} \mathrm{C}$ . $T_{\mathrm{w}}=21.00^{\circ} \mathrm{C}$
Correct! - Part (b) $\boldsymbol{V}$ .
Calculate the final temperature, in degrees Celsius, when 1.25 kcal of heat transfers to 1.25 kg of concrete, originally at $20^{\circ} \mathrm{C}$ . $T_{\mathrm{c}}=25.00^{\circ} \mathrm{C}$ ${ }^{7}$ Correct! - Part (c) $\boldsymbol{V}$
Calculate the final temperature, in degress Celsius, when 1.25 kcal of heat transfers to 1.25 kg of the steel, originally at $20^{\circ} \mathrm{C}$ . $T_{\mathrm{s}}=29.30^{\circ} \mathrm{C}$ $\checkmark$ Correct! Part (d) Calculate the final temperature, in degrees Celsius, when 1.25 kcal of heat transfers to 1.25 kg of the mercury, originally at $20^{\circ} \mathrm{C}$ .

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Problem 2194

Find the mode(s) for the data items in the given frequency distribution. \begin{tabular}{|l|c|c|c|c|c|c|c|c|} \hline Score, x & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\ \hline Frequency, f & 2 & 5 & 1 & 4 & 4 & 4 & 1 & 6 \\ \hline \end{tabular}
Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The mode(s) is/are $\square$ (Use a comma to separate answers as needed.) B. There is no mode.

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Problem 2195

Sports Betting Secret - Google Docs 11/22/24 ATL @ CHI /// Stats /// Cleaning the... Home - Northern Essex Community College...
Homework : $4: 7(1,2,3,4) 8(2,3,4)$ Question 1 of 40 (1 point) I Question Attempt: 1 of 3 1
2 3 4 5 6 7 8 9
The waiting time at a bus stop for the next bus to arrive is uniformly distributed between 0 and 10 minutes.
Part: $0 / 3$ $\square$
Part 1 of 3 (a) Find the probability that the waiting time is less than 4 minutes.
The probability that the waiting time is less than 4 minutes is $\square$ .

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Problem 2196

Homework ; $4: 7(1,2,3,4) 8(2,3,4)$ Home - Northern Essex Communi Question 1 of 40 (1 point) I Question Attempt: 1 of 3 $\equiv 1$ 2 3 4 5 6 7 8 9
The waiting time at a bus stop for the next bus to arrive is uniformly distributed between 0 and 10 minutes. Part 1 of 3 (a) Find the probability that the waiting time is less than 4 minutes.
The probability that the waiting time is less than 4 minutes is $\frac{2}{5}$ .
Part 2 of 3 (b) Find the probability that the waiting time is greater than 3 minutes.
The probability that the waiting time is greater than 3 minutes is $\frac{7}{10}$ .
Part: $2 / 3$
Part 3 of 3 (c) Find the probability that the waiting time is between 2 and 8 minutes.
The probability that the waiting time is between 2 and 8 minutes is $\square$ . Shol Ch Chgck - 2024 MEGTaw HIILLC. AI Roghts

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Problem 2197

brtsbook at Fa... Sports Betting Secret - Google Docs 11/22/24 ATL @ CHI /// Stats /// Cleaning the... Home - Northern Essex Community College... Content Homework \# 4: 7(1,2,3,4) 8(2,3,4) Question 2 of 40 (1 point) I Question Attempt: 1 of 3 $\checkmark 1$ 2 3 4 5 6 7 8 9 10 11
The following figure is a probability density curve that represents the grade point averages (GPA) of the graduating seniors at a large university.
Part 1 of 2
Find the proportion of seniors whose GPA is between 3.1 and 3.4. The proportion of seniors whose GPA is between 3.1 and 3.4 is $\square$ .
Part 2 of 2
What is the probability that a randomly chosen senior will have a GPA greater than 3.4 ? The probability that a randomly chosen senior will have a GPA greater than 3.4 is $\square$ . Che. Save For Later Submit As -2024 MaGraw Hill LIC. All Righis Reserved. Tamsol Use - P Privasy Center

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Problem 2198

Calculate the percentage of students who preferred morning from a class of 30 students: Morning: 3, Afternoon: 3, Evening: 6, Night: 18.

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Problem 2199

Identify the level of measurement for the region you live in: North, South, East, West. Options: nominal, ordinal, interval, ratio.

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Problem 2200

Calculate the interquartile range for these data sets: Set 1: 21, 5, 14, 10, 8, 17, 2 Set 2: 27, 26, 31, 23, 28, 32, 26 Which set has an interquartile range indicating data is closer to the median?

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1 ...19 20 21 22 23 24 25 ...63

Data & Statistics

Problem 2101

Problem 2102

Problem 2103

Problem 2104

Problem 2105

Problem 2106

Problem 2107

Problem 2108

Problem 2109

Problem 2110

Problem 2111

What is the probability of selecting a random month of the year and getting a month that starts with the letter "J"?If you get stuck, consider listing the sample space. Submit

Problem 2112

Problem 2 4−404-404−40A bag has 6 blocks in it.Joel picks a block out of the bag 60 times. He gets a green block 43 times.Based on these results, how many blocks do you expect to be green? □\square□ Submit and Explain

Problem 2113

Problem 2114

Problem 2115

Problem 2116

a group of tects lest wibhth wes 28 with a rengs ond standerd Geviction belowt the meshilhow manny clathe clowntload? 253123

Problem 2117

Which of the following relations represent functions? Select all that apply. \begin{tabular}{|c|c|c|c|c|c|} \hlinexxx & -2 & -1 & 0 & 1 & 2 \\ \hlineyyy & 3 & 3 & 3 & 3 & 3 \\ \hline \end{tabular}

Problem 2118

The Virginia Cooperative Extension reports the mean weight of yearling Angus steers is 1152 lbs. Suppose the standard deviation is 84 lbs . How many standard deviations from the mean would a steer weighing 1000 lbs be? 0.6190 1.8095 −1.8095-1.8095−1.8095 −0.6190-0.6190−0.6190

Problem 2119

Problem 2120

A building supply manufacturer tracked its annual proauction revers. Annual salesWhich item did the manufacturer produce the most of? brackets nuts screws nails

Problem 2121

Problem 2122

Problem 2123

Tep 50 melliress 61 twerdentg Scieers.A puzzle book company polled its readers about their favourite type of puzzles.Puzzle preferenceIf 220 readers were polled, how many more of them selected crosswords than Sudokus? □\square□ readers Submit Next up Done for now? Tru these next:

Problem 2124

Problem 2125

Problem 2126

Let XXX be a non-negative random variable with a distribution such that P(X>a)=e−1.4aP(X>a)=e^{-1.4 a}P(X>a)=e−1.4a for all a>0a>0a>0. Calculate P(eX−0.8≤1)P\left(e^{X}-0.8 \leq 1\right)P(eX−0.8≤1).Answer: □\square□

Problem 2127

Problem 2128

Problem 2129

Problem 2130

Determine whether the normal sampling distribution cain be used. The claim is p<0.015p<0.015p<0.015 and the sample size is n=150n=150n=150. Use the normal distribution. Do not use the normal distribution.

Problem 2131

Problem 2132

Problem 2133

Problem 2134

Problem 2135

Problem 2136

Problem 2137

Problem 2138

3. Use the bar graph to the right to determine the percent of increase in sales from the first to the second quarter.Company A □\square□ \%

Problem 2139

Problem 2140

Problem 2141

Problem 2142

Problem 2143

Problem 2144

When rolling two dice, the probability of rolling doubles is 1/61 / 61/6, suppose a game player roll the dice 5 times hoping to get double. What is the probability that the player gets doubles between 2 to 5 times (exclusive)? (round to the third decimal)

Problem 2145

Problem 2146

Problem 2147

John tossed a coin ten times with the desire of getting tails each time. (This is representing a binomial distribution) True False

Problem 2148

In a binomial distribution if it is expected that 56%56 \%56% of people will have pets then when a sample of 125 people are selected it is expected that 70 will not have pets. True False

Problem 2149

Problem 2150

Problem 2151

Problem 2152

Problem 2153

Problem 2154

An elementary school claims that the standard deviation in reading scores of its fourth grade students is less than 4.35. Determine whether the hypothesis test is right-tailed, left-tailed, or two-tailed.

Problem 2155

Problem 2156

Adriana wrote down how many cups of lemonade she sold in the past 5 days. Cups of lemonade soldWhat is the median of the numbers? □\square□ Submit

Problem 2157

Problem 2158

Problem 2159

Problem 2160

Problem 2161

Problem 2162

Problem 2163

Rohan describes the dataset 16,40,39,45,2016,40,39,45,2016,40,39,45,20 by calculating the spread. Which equation gives the value of the spread? (1 point) 40−16=2440-16=2440−16=24 45−20=2545-20=2545−20=25 40−20=2040-20=2040−20=20 45−16=2945-16=2945−16=29

What is the probability of selecting a random month of the year and getting a month that starts with the letter "J"?
If you get stuck, consider listing the sample space. Submit

Problem 2 $4-40$
A bag has 6 blocks in it.
Joel picks a block out of the bag 60 times. He gets a green block 43 times.
Based on these results, how many blocks do you expect to be green? $\square$ Submit and Explain

a group of tects lest wibhth wes 28 with a rengs ond standerd Geviction belowt the meshilhow manny clathe clowntload? 25
31
23

Which of the following relations represent functions? Select all that apply.
\begin{tabular}{|c|c|c|c|c|c|} \hline $x$ & -2 & -1 & 0 & 1 & 2 \\ \hline $y$ & 3 & 3 & 3 & 3 & 3 \\ \hline \end{tabular}

The Virginia Cooperative Extension reports the mean weight of yearling Angus steers is 1152 lbs. Suppose the standard deviation is 84 lbs . How many standard deviations from the mean would a steer weighing 1000 lbs be? 0.6190 1.8095 $-1.8095$ $-0.6190$

A building supply manufacturer tracked its annual proauction revers. Annual sales
Which item did the manufacturer produce the most of? brackets nuts screws nails

Tep 50 melliress 61 twerdentg Scieers.
A puzzle book company polled its readers about their favourite type of puzzles.
Puzzle preference
If 220 readers were polled, how many more of them selected crosswords than Sudokus? $\square$ readers Submit Next up Done for now? Tru these next:

Let $X$ be a non-negative random variable with a distribution such that $P(X>a)=e^{-1.4 a}$ for all $a>0$ . Calculate $P\left(e^{X}-0.8 \leq 1\right)$ .
Answer: $\square$

Determine whether the normal sampling distribution cain be used. The claim is $p<0.015$ and the sample size is $n=150$ . Use the normal distribution. Do not use the normal distribution.

3. Use the bar graph to the right to determine the percent of increase in sales from the first to the second quarter.
Company A $\square$ \%

When rolling two dice, the probability of rolling doubles is $1 / 6$ , suppose a game player roll the dice 5 times hoping to get double. What is the probability that the player gets doubles between 2 to 5 times (exclusive)? (round to the third decimal)

In a binomial distribution if it is expected that $56 \%$ of people will have pets then when a sample of 125 people are selected it is expected that 70 will not have pets. True False

Adriana wrote down how many cups of lemonade she sold in the past 5 days. Cups of lemonade sold
What is the median of the numbers? $\square$ Submit

Rohan describes the dataset $16,40,39,45,20$ by calculating the spread. Which equation gives the value of the spread? (1 point) $40-16=24$ $45-20=25$ $40-20=20$ $45-16=29$

Find the median of the data set: $56,60,60,40,60$ , $75,40,25,53,34,62,76$ (1 point)

A deck of 108 cards contains an equal number of each color: red, yellow, green, and black. If a card is chosen at random, what is the probability that it is black? $\frac{1}{27}$ $\frac{1}{108}$ $\frac{1}{4}$ $\frac{1}{3}$

Numeric 1 point
When rolling two dice, the probability of rolling doubles is $1 / 6$ , suppose a game player roll the dice 5 times hoping to get double. What is the probability that the player gets doubles less than 3 times? (round to the third decimal)
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