Measures of Central Tendency

Problem 201

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For the following, indicate whether a confidence interval for a proportion or mean should be constructed to estimate the variable of interest. Justify your response. Does chewing your food for a longer period of time reduce one's caloric intake of food at dinner? A researcher requires a sample of 75 healthy males to chew their food twice as long as they normally do. The researcher then records the calorie consumption at dinner.
The confidence interval for a $\square$ should be constructed because the variable of interest is $\square$ which is a $\square$ variable.

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Problem 202

In a class of 50 students, on average, 6 will be left-handed. If a class includes 21 "lefties", estimate how many students are in the class.
The class has approximately $\square$ students.

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Problem 203

\begin{tabular}{c|c|c|c|c|c|c|c|c|c|} \hline 8 & 6 & 5 & 7 & 5 & 6 & 6 & 4 & 5 & 4 \\ \hline 6 & 6 & 5 & 6 & 6 & 7 & 9 & 8 & 7 & 5 \\ 5 & 3 & 3 & 5 & 4 & 9 & 7 & 8 & 6 & 7 \\ 5 & 8 & 8 & 6 & 7 & 7 & 6 & 7 & 7 & 6 \\ 4 & 6 & 6 & 7 & 6 & $y$ & 7 & 7 & 8 & 5 \\ \hline \end{tabular}
Inshuction: (1) Supply the dato in to a Cummuloture table [clases'] (3) Compente the mean, He Meolian, and te Mooe (3) Make a graphic Analyris to the remelts

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Problem 204

1. Find the rate of change (cost per hour) for renting the equipment from a local hardware store if the rate of change is constant. \begin{tabular}{|l|l|l|} \hline hours & 11 & 14 \\ \hline cost & $\$ 91$ & $\$ 109$ \\ \hline \end{tabular} a) $\frac{1}{8}$ b) 8 c) 10 d) $\frac{1}{6}$ e) 6

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Problem 205

Select the appropriate word or phrase to complete the sentence.
Part: $0 / 2$
Part 1 of 2
The closer $r$ is to (Choose one) $\square$ , the more strongly negative the linear association is.

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Problem 206

A lender estimates the closing costs on a home loan of $\$ 50,000$ as listed below. \begin{tabular}{|c|c|} \hline Closing Cost & Charge \\ \hline Loan origination & $\$ 200$ \\ \hline Title insurance & $\$ 530$ \\ \hline Attorney's fees & $\$ 600$ \\ \hline Appraisal & $\$ 265$ \\ \hline Inspection & $\$ 575$ \\ \hline Recording fees & $\$ 130$ \\ \hline Escrow & $\$ 800$ \\ \hline & \\ \hline \end{tabular}
If the lender's good faith estimates are accurate, are they a reasonable amount for closing costs? Why or why not? a. Yes, because the lender estimated $3.08 \%$ of the home loan in closing costs which falls between 3 - 5\%. b. Yes, because the lender estimated $4.6 \%$ of the home loan in closing costs which does not fall between $3-5 \%$ . c. No, because the lender estimated $6.2 \%$ of the home loan in closing costs which does not fall between 3 - 5\%. d. No, because the lender estimated $17.7 \%$ of the home loan in closing costs which does fall

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Problem 207

The spreadsheet shows exam scores for one class. \begin{tabular}{|l|l|c|c|} \hline & \multicolumn{1}{|c|}{ A } & B & C \\ \hline 1 & Student & Exam 1(\%) & Exam 2(\%) \\ \hline 2 & Toby & 13 & 1 \\ \hline 3 & Pam & 62 & 26 \\ \hline 4 & Dwight & 49 & 6 \\ \hline 5 & Creed & 25 & 3 \\ \hline 6 & Stanley & 50 & 51 \\ \hline 7 & Kevin & 75 & 36 \\ \hline 8 & Gabe & 56 & 52 \\ \hline 9 & Michael & 83 & 38 \\ \hline 10 & Andy & 32 & 54 \\ \hline 11 & Darryl & 33 & 28 \\ \hline 12 & Phyllis & 75 & 2 \\ \hline 13 & Jim & 118 & 12 \\ \hline 14 & Holly & 37 & 27 \\ \hline \end{tabular}
Find the mean for all Exam 1 scores. (Round to one decimal place.)
The mean for all Exam 1 scores, rounded to one decimal place, is approximately $\square$ $\%$ 。

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Problem 208

The spreadsheet shows exam scores for one class. \begin{tabular}{|c|c|c|} \hline & A & B \\ \hline 1 & Student & Exam Score (\%) \\ \hline 2 & Pat & 44 \\ \hline 3 & Leanne & 66 \\ \hline 4 & Hanna & 91 \\ \hline 5 & Steven & 10 \\ \hline 6 & Craig & 97 \\ \hline 7 & Logan & 95 \\ \hline 8 & Tyler & 87 \\ \hline \end{tabular}
Find the median for the exam scores. (Round to one decimal place when necessary.)
The median is $\square$ $\%$ .

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Problem 209

At a certain driver's license testing station,only $40 \%$ of all new drivers pass the behind-the-wheel test the first time they take it. A sample of 50 new drivers from a certain high school found that $36 \%$ of them had passed the test the first time. Which of these numbers is a statistic? $40 \%$ 50 36\%

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Problem 210

Six test scores for Jonathan's history class are listed. Find the mean and median. Round to the nearest tenth if necessary. Did the mean or median give a better overall score for Jonathan's performance? $75 \%, 98 \%, 55 \%, 97 \%, 50 \%, 57 \%$
Part: $0 / 3$ $\square$
Part 1 of 3
The mean for the six test scores is $\square$ \%.

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Problem 211

The prices of four phones are $\$ 142, \$ 171, \$ 242$ , and $\$ 193$ .
Part: $0 / 3$ $\square$
Part 1 of 3 (a) Find the mean of these prices.
The mean price of the phones is $\$$ $\square$ .

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Problem 212

The spreadsheet shows exam scores for one class. \begin{tabular}{|l|l|c|} \hline & \multicolumn{1}{|c|}{ A } & B \\ \hline 1 & Student & Exam Score (\%) \\ \hline 3 & Leanne & 70 \\ \hline 4 & Steven & 58 \\ \hline 5 & Tyler & 94 \\ \hline 6 & Pat & 71 \\ \hline 7 & Craig & 0 \\ \hline 8 & Logan & 12 \\ \hline 9 & Hanna & 98 \\ \hline \end{tabular}
Determine the following for all exam scores and for scores without Craig's zero (dude didn't even show up... Come on, man!). Round to one decimal place when necessary.
Part 1 of 6 (a) Find the mean for all exam scores.
Mean: $\square$
Part 2 of 6 (b) Find the mean for all nonzero exam scores.
Mean: $\square$
Part 3 of 6 (c) Find the median for all exam scores.
Median: $\square$
Part 4 of 6 (d) Find the median for all nonzero exam scores.
Median: $\square$
Part 5 of 6 (e) Find the mode for all scores.
If there is more than one mode, separate them with commas. Select "None" if applicable. Mode(s): $\square$ None

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Problem 213

The spreadsheet shewrs exam scares for one dass. \begin{tabular}{|l|l|c|} \hline & \multicolumn{1}{|c|}{ A } & B \\ \hline 1 & Student & Exam Score (\%) \\ \hline 3 & Leanne & 70 \\ \hline 4 & Steven & 58 \\ \hline 5 & Tyler & 94 \\ \hline 6 & Pat & 71 \\ \hline 7 & Craig & 0 \\ \hline 8 & Logan & 12 \\ \hline 9 & Hanna & 98 \\ \hline \end{tabular}
Determine the following for all exam scores and for scores without Craig's xero (dude didnteven show up... Come on, man!), Round to one decimal place when necessary.
Part 1 of 6 (a) Find the mean for all exam scores.
Mean: $\square$
Part 2 of 6 (b) Find the mean for all nonzero exam scores.
Mean: 67.2 $\square$
Part 3 of 6 (c) Find the medien for all exam scores.
Median 70 $\square$ $\square$
Part 4 of 6 (d) Find the median for all nonaero exam scores.
Median $\square$ 70.5 $\square$
Part 5 of 6 (e) Find the mooe tor all scores.
If there is mare than one made, separate them with commas. Select "None" it applicable. Mode(s) None $\square$
Mart bolt of (9) Find the mage fir all nerder exam scoces
If thene is mare than sone made, separate them wath conmas Siplect "Nane" if applicabio.

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Problem 214

The average price of a new car is $\$ 28,400$ .
True
False

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Problem 215

$\text{The standard cost of Product YY includes 3 hours of direct labor at } \$12.00 \text{ per hour. During July, the company incurred 3,500 hours of direct labor at an average rate of } \$12.40 \text{ per hour. It produced 1,200 units.}$
$\text{Compute the total labor variance.}$

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Problem 216

The standard cost of Product YY includes 3 hours of direct labor at $\$ 12.00$ per hour. During July, the company incurred 3,500 hours of direct labor at an average rate of $\$ 12.40$ per hour. It produced 1,200 units.

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Problem 217

Select the best alternative based on present worth: A: $-25,000$ , B: $-12,000$ , C: $10,000$ . Which to choose?

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Problem 218

Find the mode, median, and mean of the weekly wages of 65 employees: 55 (8), 65 (10), 785 (16), 85 (14), 95 (10), 105 (5), 115 (2).

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Problem 219

Convert Peter's 15/20, Khando's 7/10, and Mellisa's 17/25 to percentages to find who scored the highest.

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Problem 220

Which option is true about the data sets $X = \{6, 8, 10, 12, 14\}$ and $Y = \{3, 4, 5, 24, 7\}$ ? A) $Y$ is skewed. B) $X$ has no mode. C) Mean of $Y$ is 5. D) Both are symmetrical.

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Problem 221

Calculate the median of the following rates: € 1.19, € 1.15, € 1.16, € 1.17, € 1.17, € 1.15, € 1.16, € 1.18, € 1.17, € 1.19, € 1.18, € 1.20.

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Problem 222

Find the mode and median of the ages of 21 students: 16 (6), 17 (3), 18 (8), 19 (4) years.

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Problem 223

Find the mode and median of the button counts: 30 (2), 32 (5), 28 (3), 33 (1).

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Problem 224

Calculate the mean race time for 15 runners with the following times: 10 (4), 11 (5), 12 (3), 14 (2), 15 (1) minutes.

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Problem 225

15 students scored goals: 8 scored 1, 4 scored 2, 2 scored 3, 1 scored 4. Find the mode and median of goals scored.

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Problem 226

Complete the frequency table and find the mean, given $\Sigma f = 113$ and $\Sigma f x = 292$ .

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Problem 227

Calculate the average distance walked by the group using the data: 8, 10, 12, 14, 16, 20 miles with respective walkers.

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Problem 228

Complete the frequency table, calculate the mean ( $\frac{292}{113} \approx 2.6$ ), and find the median.

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Problem 229

Find the mean number of books sold given the frequency data: 0 (2), 1 (4), 2 (3), 3 (6), 4 (3), 5 (2).

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Problem 230

Calculate the mean rate charged for rooms based on the rates: £120 (26), £90 (4), £100 (0), £140 (12), £155 (3).

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Problem 231

Calculate the mean rate charged for rooms occupied that night given the rates: Double £120, Single £90, Superior £100, Double with View £140, King with View £155.

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Problem 232

Complete the table and find the mean number of apples, given frequencies and products: $x$ , $f$ , and $fx$ .

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Problem 233

Calculate the estimated mean revision time for 120 students given the following time intervals and frequencies:
$0<t \leq 15$ : 0, $15<t \leq 30$ : 20, $30<t \leq 45$ : 50, $45<t \leq 60$ : 50.

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Problem 234

(a) Fill in the missing values in the frequency distribution table. (b) Find the mean: $\frac{292}{113} \approx 2.6$ . (c) Determine the median. (d) Create a frequency histogram.

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Problem 235

Find the central tendency measures (mode, median, mean) and compute range, IQR, quartile deviation, and standard deviation for the data: Marks: 0-20 (5), 20-40 (15), 40-60 (30), 60-80 (8), 80-100 (2).

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Problem 236

Find the mean wind chill temperature in degrees Fahrenheit for these values: -5, -4, 3, -11, 2, -8, 5, -6.

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Problem 237

Sort the clinic visitor data, find the mode, and determine the median from these numbers: 34, 6, 23, 12, 37, 3, 28, 8, 22, 17, 26, 18, 12, 16, 11, 23, 39, 15, 31, 12, 10, 19, 14, 25, 20, 9.

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Problem 238

Find the mode, median, and mean of the quiz scores: 5 (9), 8 (15), 9 (5), 10 (1). Total students = 30. Median =

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Problem 239

Find the mode, median, and mean of the weights given: 60 (8), 65 (6), 70 (4), 75 (2) for 20 students.

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Problem 240

Find the mean, median, and mode for the data set: 14, 10, 16, 14, 11.

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Problem 241

Identify the expression for calculating the mean of a binomial distribution.
Choose the correct answer below. np $\sum\left[x^{2} \cdot P(x)\right]-\mu^{2}$ $\sqrt{n p q}$ npq

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Problem 242

\textbf{Survey Question:} How old were you when you had your first child?
\textbf{Purpose:} The purpose of the study was to identify the age at which women had their first child. Managing children while attending school could affect grades. The survey was conducted by asking 25 family members and co-workers at the VA.
\textbf{Data Collected:} The ages at which respondents had their first child were: $16, 17, 18, 18, 19, 21, 21, 22, 26, 26, 27, 27, 27, 28, 29, 29, 29, 30, 30, 30, 30, 32, 33, 35, 37$
\textbf{Frequency Chart:} \begin{tabular}{|c|c|c|} \hline \text{Age} & \text{Frequency} & \text{Relative Frequency} \\ \hline 16-19 & 6 & \frac{6}{25} = 24\% \\ \hline 20-23 & 3 & \frac{3}{25} = 12\% \\ \hline 24-27 & 5 & \frac{5}{25} = 20\% \\ \hline 28-31 & 7 & \frac{7}{25} = 28\% \\ \hline 32 & 4 & \frac{4}{25} = 16\% \\ \hline \end{tabular}
\textbf{Data Analysis:} \begin{itemize} \item Mean $= 27$ \item Median $= 25.8$ \item Mode $= 18, 27, 29, 30$ \end{itemize}
\textbf{Five Number Summary:} \begin{itemize} \item Minimum $= 16$ \item Q1 $=$ \item Median $=$ \item Q3 $=$ \item Maximum $= 37$ \end{itemize}
\textbf{Additional Calculations:} \begin{itemize} \item Range $=$ \item Standard Deviation $=$ \end{itemize}
\textbf{Explanation of Standard Deviation:}
\textbf{Conclusion:}
129 words
USD/CNY +0.12\% Search

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Problem 243

Data sets A and B are dependent. Find $\overline{\mathrm{d}}$ . \begin{tabular}{l|lllll} A & 40 & 38 & 57 & 53 & 41 \\ \hline B & 38 & 34 & 35 & 45 & 32 \end{tabular} A. 25.2 B. -5.1 C. 33.1 D. 9.0

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Problem 244

Find the mode(s) of the following dataset: $9.6,10,10.3,11.7,12.3,16.9,17.1,17.9,11.7,10$ a. 25.0 b. 17.1 c. 16.9 \%50\% 10 \%50\% 11.7 d. 17.0

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Problem 245

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 246

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 247

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 248

```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 249

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 250

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 251

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 252

\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 253

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 254

\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 255

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 256

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 257

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 258

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 259

Find the mean of the following numbers: 28, 40, 53, 39, 45.

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Problem 260

Calculate the mean of the data set: $28, 40, 53, 39, 45$ .

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Problem 261

Find the median of the following data set: 15, 19, 24, 12, 9, 24, 19, 16, 21, 12.

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Problem 262

Find the mean of the walking times: 10 (1), 15 (2), 20 (2), 25 (1) minutes. Use frequencies to calculate.

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Problem 263

Find the median of miles to the nearest airport given the data: 20 (3), 22 (2), 24 (1), 26 (4).

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Problem 264

A survey of high-school students showed 294 white and 75 minority graduates. What percent are white? Round to one decimal place.

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Problem 265

Summarize the ethnic distribution of 1772 qualified applicants: $\square \%$ Black or Hispanic, $\square \%$ Asian, $\square \%$ White.

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Problem 266

A high school surveyed students about post-graduation plans. What percent are white and planning for a 2-year college?

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Problem 267

A high school survey shows plans of graduates. Calculate the following percentages based on the data provided.

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Problem 268

A high school survey shows plans of white and minority students. Find percentages for parts a) to c) based on the data.

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Problem 269

Find the modal class of wallaby heights and estimate the mean and standard deviation from the given frequency data.

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Problem 270

Find the modal class of wallaby heights and estimate the mean and standard deviation from the data given.

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Problem 271

Al surveyed 60 people on restaurant spending.
a) Identify the modal class.
b) Estimate the mean.
c) Estimate the standard deviation and discuss it.
d) Estimate the variance, range, and interquartile range, explaining why they are estimates.

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Problem 272

Miranda scored 6 points in periods 1 & 3, 8 in 2 & 4. Tamera scored 14 in periods 1 & 3. Who scored more points?

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Problem 273

Miranda scored 6 points in periods 1 & 3, 8 in 2 & 4. Tamera scored 14 in 1 & 3. Which statement is true? F, G, H, or J?

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Problem 274

Approximate the average rate of change of infections from 0 to 8 days after April 1, 2020, using $P(8) \approx 5.55$ .

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Problem 275

Miranda scored 6 points in periods 1 & 3, 8 in 2 & 4. Tamera scored 14 in periods 1 & 3. Which statement is true?

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Problem 276

Approximate the average rate of change of infections from 0 to 8 days after April 1, 2020, using $P(8) - P(0)$ .

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Problem 277

Find the average rate of change of infections from day 0 to day 16, given $P(0) = 3$ , $P(8) \approx 5.55$ , $P(16) \approx 10.28$ . Round to two decimal places in thousand people per day.

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Problem 278

Given 13 college students' credits: 8, 10, 11, 1, 1, 8, 7, 7, 7, 9, 7, 7, 8.
1. Calculate the mean. Discuss its validity.
2. Calculate the median. Discuss its validity.
3. Calculate the mode. Discuss its validity.

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Problem 279

Tucker sees 20-30 raccoons on clear nights and 10-15 on cloudy nights. What does this suggest about raccoon activity?

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Problem 280

Find the average rate of change of $Y$ over the interval $[-4, 4]$ using the values provided in the table.

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Problem 281

A computer's graphics program opens 8 seconds faster and the email program 5 seconds faster. Which has more improvement? Explain.

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Problem 282

The graphics program improved by -8 seconds and the email program by -5 seconds. Which improved more? Explain.

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Problem 283

A town has a population of $9000$ , with $\frac{5}{9}$ males. If $40\%$ of males are married, find the married females' percentage.

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Problem 284

A town has a population of $9000$ , with $\frac{3}{9}$ males. If $40\%$ of males are married, find the % of married females. (a) $50\%$ (b) $40\%$ (c) $45\%$ (d) None of these

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Problem 285

When you multiply a value by 100, the decimal moves two places right. Find the percentage of salt in 125 g seasoning with 74.0 g salt.

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Problem 286

Find the average score of the last four home games: $69, 79, 58, 66$ . Did they score more at home or away compared to an average of 61?

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Problem 287

What percent of students studied less than 10 minutes if Jeffrey studied for 25 minutes?

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Problem 288

Find the median for the following group of data items. $70,10,40,10,30$
The median is $\square$ (Type an integer or a decimal.)

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Problem 289

Answer the questions below. (a) The following number of people attended the last 9 screenings of a movie: $117 \text {, 195, 197, 198, 199, 202, 204, } 207 \text {, } 209 .$
Which measure should be used to summarize the data? Mean Median Mode (b) Salma has recorded the number of miles she has driven for each of the last 10 weeks: $386,388,392,395,396,402,406,407,415,418 .$
Which measure should be used to summarize the data? Mean Median Mode (c) Jina wants to determine which letter appears the most often in her favorite poem.
Which measure should she use? Mean Median Mode

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Problem 290

There are 48 states in a certain country. The histogram shows murder rates per 100,000 residents and the number of states that had these rates in a certain year. Use this information to complete parts (a) through (e) to the right.
Murder Rates per 100,000 Residents, by State a. Is the shape of this distribution best classified as normal, skewed left, or skewed right?
Choose the correct distribution type below. A. Normal distribution B. Skewed left c. Skewed right b. Uniform distribution b. Calculate the mean murder rate per 100,000 residents for the states.
The mean murder rate is $\square$ murders per 100,000 residents. (Type an integer or decimal rounded to two decimal place as needed.)

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Problem 291

Watch Video Show Examples
A survey stopped men and women at random to ask them where they purchased groceries, at a local grocery store or online.
Grocery Options \begin{tabular}{|c|c|c|c|} \hline & Store & Online & Total \\ \hline Women & 37 & 12 & 49 \\ \hline Men & 40 & 11 & 51 \\ \hline Total & 77 & 23 & 100 \\ \hline \end{tabular}
What percent of the men surveyed shop online? Round your answer to the nearest whole number pércent.

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Problem 292

Question Watch Video Show Examples
A survey asked a group of adults and youths if they prefer reading books printed on paper or electronic books.
Book Preference \begin{tabular}{|c|c|c|c|} \hline & Print & Electronic & Total \\ \hline Youths & 27 & 40 & 67 \\ \hline Adults & 29 & 27 & 56 \\ \hline Total & 56 & 67 & 123 \\ \hline \end{tabular}
What percent of the adults surveyed prefer reading electronic books? Round your answer to the nearest tenth of a percent. Answer Attempt 1 out of 5

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Problem 293

This question: 1 point(s) possible Subm
Find the mean for the data items in the given frequency distribution. \begin{tabular}{|l|l|l|l|l|l|l|l|l|} \hline Score, $\mathbf{x}$ & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\ \hline Frequency, $\mathbf{f}$ & 3 & 6 & 2 & 5 & 3 & 1 & 3 & 2 \\ \hline \end{tabular}
The mean is $\square$ (Round to 3 decimal places as needed.)

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Problem 294

letting and Onlin. Sports Betting Secret --. Home - Northern Essex Content A Aleks - Jonathan Vcga... ChatGPT (5) KaiCenat - Twitch Homework : $4: 7(1,2,3,4) 8(2,3,4)$ Question 34 of 40 (1 point) | Question Attempt: 1 of 3 Jonathan 2 $\checkmark 23$ 24 25 26 27 28 29 31 Español $\checkmark 33$
Volunteering: The General Social Survey asked 1305 people whether they performed any volunteer work during the past year. A total of 522 people said they did.
Part: $0 / 3$
Part 1 of 3 (a) Find a point estimate for the proportion of people who performed voluntee work during the past year. Round the answer to at least three decimal places.
The point estimate for the proportion of people who performed volunteer work during the past year is $\square$ . Skip Part Check Save For Later Submit Assignment o 2024 McGraw Hill LLC. All Rights Resenved. Terms of Use II Privacy Center I Accessibility

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Problem 295

Following are the marks of 13 students in a small quiz: $2,7,3,6,5,4,8,5,8,6,5,9,3$ then the median of these marks is 6.5 6 5.5 5 None of these

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Problem 296

Claim: The mean pulse rate (in beats per minute) of adult males is equal to 68.7 bpm . For a random sample of 166 adult males, the mean pulse rate is 68 bpm and the standard deviation is 10.8 bpm . Complete parts (a) and (b) below. a. Express the original claim in symbolic form. $\square$ $\square$ $\square$ bpm (Type an integer or a decimal. Do not round.)

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Problem 297

Points: 0 of 1 Save
The prices of 9 houses sold in a neighborhood are shown. Complete parts (a) through (e) below. \begin{tabular}{ll} $\$ 199,000$ & $\$ 210,000$ \\ $\$ 171,000$ & $\$ 185,000$ \\ $\$ 220,000$ & $\$ 188,000$ \\ $\$ 17,000$ & $\$ 190,000$ \\ $\$ 485,000$ & \end{tabular} A. The mode of the data set is $\$$ $\square$ (Type an integer or a decimal. Use a comma to separate answers as needed.) B. There is no mode. d) Determine the midrange.
The midrange of the data set is $\$ 328,000$ . (Type an integer or a decimal.) e) Which measure of central tendency, the mean or the median, best represents the typical price of the houses sold?
The best measure of central tendency that represents the typical price of the houses sold is the mean $\square$ because the mean is not affected by unusual data values.

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Problem 298

The salaries of 10 employees of a small company are listed. Complete parts (a) through ( t ) below. \begin{tabular}{cc} \hline $\$ 27000$ & $\$ 68000$ \\ \hline 26000 & 31000 \\ \hline 28000 & 30000 \\ \hline 29000 & 79000 \\ \hline 29000 & 32000 \\ \hline \end{tabular} b) Determine the median.
The median salary is \ $29500 (Simplify your answer.) c) Determine the mode(s). Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The mode salary/salaries is/are$ \ $29000$ . (Use a comma to separate answers, but do not use commas in any individual numbers.) B. There is no mode. d) Determine the midrange.
The midrange of the data set is $\$$ $\square$ (Simplify your answer.)

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Problem 299

16. La tasa de inflación anual se define como la variación porcentual del Índice de Precios al Consumidor (IPC) de un mes respecto al mismo mes del año anterior.
En cierto pais, en abril de 2021 el IPC fue de 110 y en abril de 2022 fue de 121 , ¿cuál fue la tasa de inflación anual en el periodo descrito? A) $11 \%$ B) $10 \%$ C) $9 \%$ D) $2,1 \%$

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Problem 300

Find the mean of a normal distribution where 1 SD above is 93 and 2 SD below is 39.

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Measures of Central Tendency

Problem 201

Problem 202

In a class of 50 students, on average, 6 will be left-handed. If a class includes 21 "lefties", estimate how many students are in the class.The class has approximately □\square□ students.

Problem 203

Problem 204

Problem 205

Select the appropriate word or phrase to complete the sentence.Part: 0/20 / 20/2Part 1 of 2The closer rrr is to (Choose one) □\square□ , the more strongly negative the linear association is.

Problem 206

Problem 207

Problem 208

Problem 209

Problem 210

Problem 211

The prices of four phones are $142,$171,$242\$ 142, \$ 171, \$ 242$142,$171,$242, and $193\$ 193$193.Part: 0/30 / 30/3 □\square□Part 1 of 3 (a) Find the mean of these prices.The mean price of the phones is $\$$ □\square□ .

Problem 212

Problem 213

Problem 214

The average price of a new car is $28,400\$ 28,400$28,400.TrueFalse

Problem 215

Problem 216

The standard cost of Product YY includes 3 hours of direct labor at $12.00\$ 12.00$12.00 per hour. During July, the company incurred 3,500 hours of direct labor at an average rate of $12.40\$ 12.40$12.40 per hour. It produced 1,200 units.

Problem 217

Select the best alternative based on present worth: A: −25,000-25,000−25,000, B: −12,000-12,000−12,000, C: 10,00010,00010,000. Which to choose?

Problem 218

Find the mode, median, and mean of the weekly wages of 65 employees: 55 (8), 65 (10), 785 (16), 85 (14), 95 (10), 105 (5), 115 (2).

Problem 219

Convert Peter's 15/20, Khando's 7/10, and Mellisa's 17/25 to percentages to find who scored the highest.

Problem 220

Which option is true about the data sets X={6,8,10,12,14}X = \{6, 8, 10, 12, 14\}X={6,8,10,12,14} and Y={3,4,5,24,7}Y = \{3, 4, 5, 24, 7\}Y={3,4,5,24,7}? A) YYY is skewed. B) XXX has no mode. C) Mean of YYY is 5. D) Both are symmetrical.

Problem 221

Calculate the median of the following rates: € 1.19, € 1.15, € 1.16, € 1.17, € 1.17, € 1.15, € 1.16, € 1.18, € 1.17, € 1.19, € 1.18, € 1.20.

Problem 222

Find the mode and median of the ages of 21 students: 16 (6), 17 (3), 18 (8), 19 (4) years.

Problem 223

Find the mode and median of the button counts: 30 (2), 32 (5), 28 (3), 33 (1).

Problem 224

Calculate the mean race time for 15 runners with the following times: 10 (4), 11 (5), 12 (3), 14 (2), 15 (1) minutes.

Problem 225

15 students scored goals: 8 scored 1, 4 scored 2, 2 scored 3, 1 scored 4. Find the mode and median of goals scored.

Problem 226

Complete the frequency table and find the mean, given Σf=113\Sigma f = 113Σf=113 and Σfx=292\Sigma f x = 292Σfx=292.

Problem 227

Calculate the average distance walked by the group using the data: 8, 10, 12, 14, 16, 20 miles with respective walkers.

Problem 228

Complete the frequency table, calculate the mean (292113≈2.6\frac{292}{113} \approx 2.6113292​≈2.6), and find the median.

Problem 229

Find the mean number of books sold given the frequency data: 0 (2), 1 (4), 2 (3), 3 (6), 4 (3), 5 (2).

Problem 230

Calculate the mean rate charged for rooms based on the rates: £120 (26), £90 (4), £100 (0), £140 (12), £155 (3).

Problem 231

Calculate the mean rate charged for rooms occupied that night given the rates: Double £120, Single £90, Superior £100, Double with View £140, King with View £155.

Problem 232

Complete the table and find the mean number of apples, given frequencies and products: xxx, fff, and fxfxfx.

Problem 233

Calculate the estimated mean revision time for 120 students given the following time intervals and frequencies: 0<t≤150<t \leq 150<t≤15: 0, 15<t≤3015<t \leq 3015<t≤30: 20, 30<t≤4530<t \leq 4530<t≤45: 50, 45<t≤6045<t \leq 6045<t≤60: 50.

Problem 234

(a) Fill in the missing values in the frequency distribution table. (b) Find the mean: 292113≈2.6\frac{292}{113} \approx 2.6113292​≈2.6. (c) Determine the median. (d) Create a frequency histogram.

Problem 235

Find the central tendency measures (mode, median, mean) and compute range, IQR, quartile deviation, and standard deviation for the data: Marks: 0-20 (5), 20-40 (15), 40-60 (30), 60-80 (8), 80-100 (2).

Problem 236

Find the mean wind chill temperature in degrees Fahrenheit for these values: -5, -4, 3, -11, 2, -8, 5, -6.

Problem 237

Sort the clinic visitor data, find the mode, and determine the median from these numbers: 34, 6, 23, 12, 37, 3, 28, 8, 22, 17, 26, 18, 12, 16, 11, 23, 39, 15, 31, 12, 10, 19, 14, 25, 20, 9.

Problem 238

Find the mode, median, and mean of the quiz scores: 5 (9), 8 (15), 9 (5), 10 (1). Total students = 30. Median =

Problem 239

Find the mode, median, and mean of the weights given: 60 (8), 65 (6), 70 (4), 75 (2) for 20 students.

Problem 240

Find the mean, median, and mode for the data set: 14, 10, 16, 14, 11.

Problem 241

Identify the expression for calculating the mean of a binomial distribution.Choose the correct answer below. np ∑[x2⋅P(x)]−μ2\sum\left[x^{2} \cdot P(x)\right]-\mu^{2}∑[x2⋅P(x)]−μ2 npq\sqrt{n p q}npq​ npq

Problem 242

Problem 243

Data sets A and B are dependent. Find d‾\overline{\mathrm{d}}d. \begin{tabular}{l|lllll} A & 40 & 38 & 57 & 53 & 41 \\ \hline B & 38 & 34 & 35 & 45 & 32 \end{tabular} A. 25.2 B. -5.1 C. 33.1 D. 9.0

Problem 244

Find the mode(s) of the following dataset: 9.6,10,10.3,11.7,12.3,16.9,17.1,17.9,11.7,109.6,10,10.3,11.7,12.3,16.9,17.1,17.9,11.7,109.6,10,10.3,11.7,12.3,16.9,17.1,17.9,11.7,10 a. 25.0 b. 17.1 c. 16.9 \%50\% 10 \%50\% 11.7 d. 17.0

Problem 245

Problem 246

Problem 247

In a class of 50 students, on average, 6 will be left-handed. If a class includes 21 "lefties", estimate how many students are in the class.
The class has approximately $\square$ students.

Select the appropriate word or phrase to complete the sentence.
Part: $0 / 2$
Part 1 of 2
The closer $r$ is to (Choose one) $\square$ , the more strongly negative the linear association is.

The prices of four phones are $\$ 142, \$ 171, \$ 242$ , and $\$ 193$ .
Part: $0 / 3$ $\square$
Part 1 of 3 (a) Find the mean of these prices.
The mean price of the phones is $\$$ $\square$ .

The average price of a new car is $\$ 28,400$ .
True
False

The standard cost of Product YY includes 3 hours of direct labor at $\$ 12.00$ per hour. During July, the company incurred 3,500 hours of direct labor at an average rate of $\$ 12.40$ per hour. It produced 1,200 units.

Select the best alternative based on present worth: A: $-25,000$ , B: $-12,000$ , C: $10,000$ . Which to choose?

Which option is true about the data sets $X = \{6, 8, 10, 12, 14\}$ and $Y = \{3, 4, 5, 24, 7\}$ ? A) $Y$ is skewed. B) $X$ has no mode. C) Mean of $Y$ is 5. D) Both are symmetrical.

Complete the frequency table and find the mean, given $\Sigma f = 113$ and $\Sigma f x = 292$ .

Complete the frequency table, calculate the mean ( $\frac{292}{113} \approx 2.6$ ), and find the median.

Complete the table and find the mean number of apples, given frequencies and products: $x$ , $f$ , and $fx$ .

Calculate the estimated mean revision time for 120 students given the following time intervals and frequencies:
$0<t \leq 15$ : 0, $15<t \leq 30$ : 20, $30<t \leq 45$ : 50, $45<t \leq 60$ : 50.

(a) Fill in the missing values in the frequency distribution table. (b) Find the mean: $\frac{292}{113} \approx 2.6$ . (c) Determine the median. (d) Create a frequency histogram.

Identify the expression for calculating the mean of a binomial distribution.
Choose the correct answer below. np $\sum\left[x^{2} \cdot P(x)\right]-\mu^{2}$ $\sqrt{n p q}$ npq

Data sets A and B are dependent. Find $\overline{\mathrm{d}}$ . \begin{tabular}{l|lllll} A & 40 & 38 & 57 & 53 & 41 \\ \hline B & 38 & 34 & 35 & 45 & 32 \end{tabular} A. 25.2 B. -5.1 C. 33.1 D. 9.0

Find the mode(s) of the following dataset: $9.6,10,10.3,11.7,12.3,16.9,17.1,17.9,11.7,10$ a. 25.0 b. 17.1 c. 16.9 \%50\% 10 \%50\% 11.7 d. 17.0

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

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

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 $\square$

Calculate the mean of the data set: $28, 40, 53, 39, 45$ .

Summarize the ethnic distribution of 1772 qualified applicants: $\square \%$ Black or Hispanic, $\square \%$ Asian, $\square \%$ White.

Al surveyed 60 people on restaurant spending.
a) Identify the modal class.
b) Estimate the mean.
c) Estimate the standard deviation and discuss it.
d) Estimate the variance, range, and interquartile range, explaining why they are estimates.

Approximate the average rate of change of infections from 0 to 8 days after April 1, 2020, using $P(8) \approx 5.55$ .