Set

Problem 1401

Example: If the Quiz scores in a class with 10 students are: 3,5,5,6,4,3,2,1,5,63,5,5,6,4,3,2,1,5,6, find the arithmetic mean, median, mode, and range for these scores.

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Problem 1402

(i) AΔ(BΔC)=(AΔB)ΔCA \Delta(B \Delta C)=(A \Delta B) \Delta C (ii) A(BC)c=(AB)(AC)A \cap(B \cup C)^{c}=(A-B) \cup(A-C)

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Problem 1403

Ho:μd=0Ha:μd0\begin{array}{c} H_{o}: \mu_{d}=0 \\ H_{a}: \mu_{d} \neq 0 \end{array}
You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain the following sample of data: \begin{tabular}{|r|r|} \hline pre-test & post-test \\ \hline 28.9 & 30.1 \\ \hline 55.1 & 61.1 \\ \hline 39.6 & 37.4 \\ \hline 35.6 & -0.9 \\ \hline 52.5 & 49.6 \\ \hline 47.8 & 36.9 \\ \hline 45.3 & 31 \\ \hline 39.2 & 40.8 \\ \hline 36.5 & 37.3 \\ \hline 26.3 & 24.5 \\ \hline 44.5 & 8 \\ \hline 34.1 & 42.3 \\ \hline 35.1 & 61.3 \\ \hline 60.5 & 52.6 \\ \hline 50.7 & 49.3 \\ \hline 44.2 & 60.7 \\ \hline 52.1 & 80.9 \\ \hline \end{tabular}
What is the test statistic for this sample? test statistic == \square (Report answer accurate to 4 decimal places.)
What is the pp-value for this sample? p -value == \square (Report answer accurate to 4 decimal places.)

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Problem 1404

2. In a replication of a study in which map reading skills were investigated, 20 men and 20 women completed the original map reading task and the researchers obtained the following data: \begin{tabular}{|l|l|} \hline Male map reading scores & \begin{tabular}{l} 17,20,13,12,13,11,8,17,12,15,1417,20,13,12,13,11,8,17,12,15,14, \\ 18,20,17,17,15,13,10,5,918,20,17,17,15,13,10,5,9. \end{tabular} \\ \hline Female map reading scores & \begin{tabular}{l} 12,8,10,11,4,2,11,18,17,12,13,1012,8,10,11,4,2,11,18,17,12,13,10, \\ 3,15,11,9,10,11,16,103,15,11,9,10,11,16,10. \end{tabular} \\ \hline \end{tabular}
The mean map reading score for both groups together was 12.23. a) What percentage of the male group scored above the mean score and what percentage of the femak group scored above the mean score? Show your calculations. [4 mark ] 12÷20×100=60% men 4÷20100=20% women \begin{array}{l} 12 \div 20 \times 100=60 \% \text { men } \\ 4 \div 20 * 100=20 \% \text { women } \end{array} b) Briefly explain one reason why it is important for research to be replicated. [2 mark

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Problem 1405

2. In a replication of a study in which map reading skills were investigated, 20 men and 20 women completed the original map reading task and the researchers obtained the following data: \begin{tabular}{|l|l|} \hline Male map reading scores & \begin{tabular}{l} 17,20,13,12,13,11,8,17,12,15,1417,20,13,12,13,11,8,17,12,15,14, \\ \\ Female map reading scores \\ \hline \end{tabular} \\ \hline \end{tabular}
The mean map reading score for both groups together was 12.23. a) What percentage of the male group scored above the mean score and what percentage of the femals group scored above the mean score? Show your calculations. [4 marky 18÷20×100=65% men 6÷20100=30% women \begin{array}{l} 18 \div 20 \times 100=65 \% \text { men } \\ 6 \div 20 * 100=30 \% \text { women } \end{array} b) Briefly explain one reason why it is important for research to be replicated. [2 marks]

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Problem 1406

Whole numbers starts from \qquad one zero negative one two
The shaded region is best described as * AA union BB A intersect B B complement

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Problem 1407

Find the range and standard deviation of the set of diata 10,40,6,11.1810,40,6,11.18
The range is \square (Simplify your answer) The standard deviation is \square . (Round to the nearest hundredth as needed.)

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Problem 1408

A coordinator will select 8 songs from a list of 9 songs to compose an event's musical entertainment lineup. How many different lineups are possible?
Answer Tables Keypad How to enter your answer (opens in new window) Keyboard Shortcuts

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Problem 1409

The biggest cause of inventory loss, called shrinkage, is shoplifting, followed closely by employee theft. In one study, the nine countries with the highest shrinkage rates, measured in the dollar amount lost for every $100\$ 100 in sales, are as follows. \begin{tabular}{|c|c|c|c|c|c|c|c|c|} \hline Country & India & Russia & Morocco & South Africa & Brazil & Mexico & Thailand & Turkey \\ \hline \begin{tabular}{c} Shrinkage \\ Rate ($)(\$) \end{tabular} & 2.36 & 1.76 & 1.72 & 1.71 & 1.66 & 1.62 & 1.62 & 1.61 \\ \hline \end{tabular}
Let AA denote the set of countries that have a shrinkage rate greater than $1.65\$ 1.65, let BB be the set of countries that have a shrinkage rate between $1.65\$ 1.65 and $1.73\$ 1.73, and let CC be the set of countries that have a shrinkage rate less than $1.70\$ 1.70. Find the following sets. (Let II represent India, RR represent Russia, MM represent Morocco, SS represent South Africa, BB represent Brazil, XX represent Mexico, HH represent Thailand, and TT represent Turkey. Enter your answers using roster notation. Enter EMPTY or \emptyset for the empty set.) (a) A,BA, B, and CC A=A= \square B=B= \square C=C= \square (b) ABA \cap B \square (c) ACBA^{C} \cap B \square (d) ABCA \cap B^{C} \square

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Problem 1410

Determine the range and standard deviation of the prices of carnping tents shown below. $110,$58,$80,$58,$211,$250,$58,$101,$100\$ 110, \$ 58, \$ 80, \$ 58, \$ 211, \$ 250, \$ 58, \$ 101, \$ 100
The range of the prices is $\$ \square (Simplify your answer.)

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Problem 1411

Essays A professor wishes to see if two groups of students' essays differ in lengths, that is, the number of words in each essay. The professor randomly selects 12 essays from a group of students who are science majors and 10 essays from a group of humanities majors to compare. The data are shown. At α=0.05\alpha=0.05, can it be concluded that there is a difference in the lengths of the essays between the two groups?
Science majors 226231622450353327251776283037653357235638873416\begin{array}{lllllllllllll}2262 & 3162 & 2450 & 3533 & 2725 & 1776 & 2830 & 3765 & 3357 & 2356 & 3887 & 3416\end{array} Humanities majors \begin{tabular}{llllllllll} 2604 & 2069 & 2123 & 1468 & 1952 & 2573 & 1886 & 2921 & 2237 & 2757 \end{tabular}
Send data to Excel Use μ1\mu_{1} for the mean of science majors and μ2\mu_{2} for the mean of humanities majors. Assume the populations are normally distributed, and that the variances are unequal.
Part 1 of 5 (a) State the hypotheses and identify the claim with the correct hypothesis. H0:μ1=μ2 not claim H1:μ1μ2 claim \begin{array}{l} H_{0}: \mu_{1}=\mu_{2} \text { not claim } \\ H_{1}: \mu_{1} \neq \mu_{2} \text { claim } \end{array}
This hypothesis test is a two-tailed \quad test.
Part: 1/51 / 5
Part 2 of 5 (b) Find the critical value. Round the answer(s) to at least three decimal places. If there is more than one critical value, separate them with commas.
Critical value(s): \square

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Problem 1412

Essays A professor wishes to see if two groups of students' essays differ in lengths, that is, the number of words in each essay. The professor randomly selects 12 essays from a group of students who are science majors and 10 essays from a group of humanities majors to compare. The data are shown. At α=0.05\alpha=0.05, can it be concluded that there is a difference in the lengths of the essays between the two groups? Science majors \begin{tabular}{lllllllllllll} 2262 & 3162 & 2450 & 3533 & 2725 & 1776 & 2830 & 3765 & 3357 & 2356 & 3887 & 3416 \end{tabular}
Humanities majors 2604206921231468195225731886292122372757\begin{array}{llllllllll} \hline 2604 & 2069 & 2123 & 1468 & 1952 & 2573 & 1886 & 2921 & 2237 & 2757 \end{array}
Send data to Excel
Use μ1\mu_{1} for the mean of science majors and μ2\mu_{2} for the mean of humanities majors. Assume the populations are normally distributed, and that the variances are unequal.
Part 1 of 5 (a) State the hypotheses and identify the claim with the correct hypothesis. H0:μ1=μ2 not claim H1:μ1μ2 claim \begin{array}{l} H_{0}: \mu_{1}=\mu_{2} \text { not claim } \\ H_{1}: \mu_{1} \neq \mu_{2} \text { claim } \end{array}
This hypothesis test is a two-tailed \quad test.
Part 2 of 5 (b) Find the critical value. Round the answer(s) to at least three decimal places. If there is more than one critical value, separate them with commas.
Critical value(s): 2.262,2.2622.262,-2.262
Part: 2/52 / 5
Part 3 of 5 (c) Compute the test value. Round your answer to at least three decimal places. t=t=\square

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Problem 1413

Question 2 (2 points) What is the daughter nuclide when Bi -214 experiences beta decay? (Write your answer as a symbol-mass number) \square A

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Problem 1414

Number of Farms A random sample of the number of farms (in thousands) in various states follows. Estimate the mean number of farms per state with 99%99 \% confidence. Assume σ=31\sigma=31. Round intermediate and final answers to one decimal place. Assume the population is normally distributed. 46433549547504010978652211576816487944\begin{array}{ccccccccccc} 4 & 64 & 33 & 54 & 95 & 47 & 50 & 40 & 109 & 78 & 6 \\ 52 & 21 & 15 & 7 & 68 & 16 & 48 & 79 & 44 & & \end{array} Send data to Excel <μ<\square<\mu<\square

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Problem 1415

For each of the following sets of vectors, determine whether it is linearly independent or linearly dependent. If it is dependent, give a non-trivial linear combination of the vectors yielding the zero vector. Give your combination as an expression using u,vu, v, and ww for the vector variables u,v\mathbf{u}, \mathbf{v}, and w\mathbf{w}. a) u=[322]v=[967]w=[344]\mathbf{u}=\left[\begin{array}{c}3 \\ 2 \\ -2\end{array}\right] \mathbf{v}=\left[\begin{array}{c}-9 \\ -6 \\ 7\end{array}\right] \quad \mathbf{w}=\left[\begin{array}{c}3 \\ 4 \\ -4\end{array}\right] < Select an answer > b) u=[010]v=[1011]w=[1011]\mathbf{u}=\left[\begin{array}{l}0 \\ 1 \\ 0\end{array}\right] \mathbf{v}=\left[\begin{array}{c}10 \\ 1 \\ -1\end{array}\right] \mathbf{w}=\left[\begin{array}{c}-10 \\ -1 \\ 1\end{array}\right] < Select an answer >

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Problem 1416

Question 3 [10 points] For each of the following sets of vectors, determine whether it is linearly independent or linearly dependent. If it is dependent, give a non-trivial linear combination of the vectors yielding the zero vector. Give your combination as an expression using u,vu, v, and ww for the vector variables u,v\mathbf{u}, \mathbf{v}, and w\mathbf{w}. a) u=[132]v=[373]w=[286]\mathbf{u}=\left[\begin{array}{l}1 \\ 3 \\ 2\end{array}\right] \mathbf{v}=\left[\begin{array}{c}-3 \\ -7 \\ -3\end{array}\right] \mathbf{w}=\left[\begin{array}{c}-2 \\ -8 \\ -6\end{array}\right] pts: 0/40 / 4 ppts: 0/40 / 4 ppts: 1 / 4 < Select an answer> b) u=[121]v=[172]w=[268]\mathbf{u}=\left[\begin{array}{c}1 \\ -2 \\ -1\end{array}\right] \quad \mathbf{v}=\left[\begin{array}{c}-1 \\ 7 \\ -2\end{array}\right] \quad \mathbf{w}=\left[\begin{array}{c}-2 \\ -6 \\ 8\end{array}\right] pts: 0/40 / 4 ppts: 0/40 / 4 pts: 1 / 4 < Select an answer >

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Problem 1417

Analyze if the claim "Average planetary temperature decreases as distance from the Sun increases" is supported by the data provided.

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Problem 1418

Count the significant digits in these measurements: 3.2×102 mL3.2 \times 10^{-2} \mathrm{~mL}, 0.009500 J0.009500 \mathrm{~J}, 1.0×101 kJ/mol-1.0 \times 10^{-1} \mathrm{~kJ/mol}, 92500 kg92500 \mathrm{~kg}.

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Problem 1419

Find the domain and range of the relation {(3,4),(1,4),(6,5),(3,19)}\{(3,4),(-1,4),(6,5),(3,19)\}. Is it a function?

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Problem 1420

Identify the true statement:
1. 2\sqrt{2} is an integer.
2. 0 is neither rational nor irrational.
3. 4.8334.8 \overline{33} is rational but not an integer.
4. -6.175 is irrational.

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Problem 1421

Find the intersection of sets CC and AA: CAC \cap A where C={3,4,5,6,}C=\{3,4,5,6,\ldots\} and A={9,12,15,18,}A=\{9,12,15,18,\ldots\}.

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Problem 1422

What is the symbol for the empty set and its cardinality?

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Problem 1423

Are sets AA (months of the year) and BB (first 12 letters of the alphabet) equal, equivalent, or neither?

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Problem 1424

Analyze the customer wait data for 40 Saturdays at Bobak's. Are they discrete or continuous? Choose A, B, C, or D.

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Problem 1425

(a) What is the most common year of birth reported by the football team? Mean, Median, or Mode? (b) For the data set 28,29,31,32,33,34,35,36,39, which measure summarizes it best? Mean, Median, or Mode? (c) For the ratings 40,41,44,46,48,50,51,52,87, which measure summarizes it best? Mean, Median, or Mode?

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Problem 1426

Analyze the disposable income data for 25 cities.
(a) What analysis do you need to perform?
(b) Calculate the mean, median, mode, or range.

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Problem 1427

Fill in the Venn diagram using: n(A)=30n(A)=30, n(B)=38n(B)=38, n(C)=23n(C)=23, n(AB)=12n(A \cap B)=12, n(BC)=14n(B \cap C)=14, n(AC)=5n(A \cap C)=5, n(ABC)=2n(A \cap B \cap C)=2, n(U)=71n(U)=71.

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Problem 1428

Shannon's train fares from NYC to D.C. are: 49, 88, 119, 133, 161, 173, 272. Find the percentile ranks for \$119 and \$272, then identify the fare with a rank of about 82\%.

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Problem 1429

Determine which scenario requires permutations to count the arrangements: A, B, C, or D.

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Problem 1430

Find the number of elements in Region III of a Venn diagram with sets A, B, and C given their sizes and intersections.

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Problem 1431

Order 549 apples, 498 oranges, and 794 pears from greatest to least, then round each to the nearest hundred.

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Problem 1432

List four binary ionic compounds from Fe2+,Ni4+,Br,S2\mathrm{Fe}^{2+}, \mathrm{Ni}^{4+}, \mathrm{Br}^{-}, \mathrm{S}^{2-}.

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Problem 1433

Calculate the length of the interval [6,8][-6, 8].

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Problem 1434

Calculate the number of diamond flushes in a 3-card poker hand and its probability. Also, find total 3-card hands.

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Problem 1435

If Al's house is at 0, and Ben is 7 blocks away, what are Carol's possible locations if she's 5 blocks from Ben?

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Problem 1436

Find the equation of the line through points (r,5)(r,-5) and (3,13)(3,13) with a slope of m=8m=8.

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Problem 1437

Order the numbers from smallest to largest: 32|-32|, 2222, 16-16, 21-|21|, 10|-10|.

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Problem 1438

Identify the false statement:
1. All integers are rational numbers
2. Some rational numbers are whole numbers
3. All whole numbers are natural numbers
4. All irrational numbers are real numbers

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Problem 1439

Which set has no irrational numbers? {5.15,π,30}\{-5.15, \pi, 30\}, {92,100,5.123}\left\{\frac{9}{2}, \sqrt{100}, 5.123\right\}, or {80,100,6.56}\{\sqrt{80}, 100, 6.56\}?

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Problem 1440

A golfer has data on clubhead speeds (mph) and distances (yards) for 20 games. What analysis should be done: correlation, averages, or something else?

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Problem 1441

A survey asked 857 people about their pets. Identify (a) the sample, (b) the population, and (c) the statistic. What is the sample? A. The public in the country. B. People who didn't respond. C. The 857 respondents. D. The 9%9\% with 1 pet.

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Problem 1442

Identify (a) subject, (b) sample, and (c) population for model A midsized cars used in a pollution study.

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Problem 1443

A historian finds marriage records from 1800-1820. Answer these: a) Descriptive summary? b) Inference? c) Population? d) Is 26.1 a statistic or parameter?

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Problem 1444

Two students sample 10 each to find support for single sex classrooms. Answer parts a and b about their populations.

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Problem 1445

A historian finds marriage records (1800-1820) showing an average age of 26.1 years. Answer the following: a. What is the descriptive summary? b. What is the inference about the population? c. What population does this refer to? d. Is 26.1 a statistic or a parameter?

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Problem 1446

Is the 31%31\% response from the poll a statistic or a parameter regarding voter opinions on immigration?

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Problem 1447

Find the average pages read per day from the end of day 2 to day 6, given total pages: 45,77,116,166,22745, 77, 116, 166, 227.

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Problem 1448

Determine the missing proportions and percentages for Verbal SAT score intervals given the frequencies:
700799700-799: 17, 600699600-699: 22, 500599500-599: 15, 400499400-499: 4, 300399300-399: 2.

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Problem 1449

Find the reflection rule for triangle C(3,8),D(5,12),E(4,6)C(3,8), D(5,12), E(4,6) to C(8,3),D(12,5),E(6,4)C'(-8,-3), D'(-12,5), E'(-6,-4).

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Problem 1450

Is the salary data of each teacher in a school a population or a sample? Choose A, B, C, or D.

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Problem 1451

Classify each substance as an atomic element, molecular element, molecular compound, or ionic compound. (a) krypton (b) CoCl2\mathrm{CoCl}_{2} (c) nitrogen (d) SO2\mathrm{SO}_{2} (e) KNO3\mathrm{KNO}_{3}
SOLUTION (a) Krypton is an element that is not listed as diatomic in Table 5.2; therefore, it is an atomic element. (b) CoCl2\mathrm{CoCl}_{2} is a compound composed of a metal (left side of periodic table) and nonmetal (right side of the periodic table); therefore, it is an ionic compound. (c) Nitrogen is an element that is listed as diatomic in Table 5.2; therefore, it is a molecular element. (d) SO2\mathrm{SO}_{2} is a compound composed of two nonmetals; therefore, it is a molecular compound. (e) KNO3\mathrm{KNO}_{3} is a compound composed of a metal and two nonmetals; therefore, it is an ionic compound. SKILlBUILDER 5.4 | Classifying Substances as Atomic Elements, Molecular Elements, Molecular Compounds, or Ionic Compounds Classify each substance as an atomic element, molecular element, molecular compound, or ionic compound. (a) chlorine (b) NO (c) Au (d) Na2O\mathrm{Na}_{2} \mathrm{O} (e) CrCl3\mathrm{CrCl}_{3}
FOR MORE PRACTICE Example 5.19, Example 5.20; Problems 43, 44, 45, 46.

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Problem 1452

The numbers of students in the 7 schools in a district are given below. (Note that these are already ordered from least to greatest.) 193,222,264,310,339,363,381193,222,264,310,339,363,381
Send data to calculator
Suppose that the number 193 from this list changes to 361. Answer the following. (a) What happens to the median? It decreases by \square It increases by \square
(b) What happens to the mean?
It stays the same.

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Problem 1453

RO ALEKS A ALEKS - Keyan a nurse manager at a local hospital, wanted to know more about the hospital's full-time nurses. She polled 20 nurses at random who work full-time at the 5 of them are married. Elsa didn't know that the top hospital administrators had already surveyed all nurses who work full-time at the hospital. In that vey, it was found that the nurses take, on average, 7.2 sick days per year, that 59%59 \% of them would prefer a four-day work schedule, and that 72 of them are irried. (a) For Elsa's poll, identify the population and the sample.
Population: (Choose one) \square Sample: (Choose one) \square (b) Choose whether each number described below is a parameter or a statistic for Elsa's poll. \begin{tabular}{|l|l|l|l|} \hline Number & Parameter & Statistic \\ \hline The 65%65 \% of the randomly chosen nurses who prefer a four-day work schedule & & \\ \hline The average of 7.2 sick days per year taken among all the full-time nurses at the hospital & & \\ \hline The 72 nurses who are married among all the full-time nurses at the hospital & & \\ \hline \end{tabular}

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Problem 1454

Use the given sample data to find Q3Q_{3}. 4952525274675555\begin{array}{llllllll} 49 & 52 & 52 & 52 & 74 & 67 & 55 & 55 \end{array}

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Problem 1455

Weakest bond
Strongest bond
Weakest bond
Answer Bank C-F CBr\mathrm{C}-\mathrm{Br} C-I

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Problem 1456

Most ionic \square Most covalent Anumer Bant CaF\mathrm{Ca}-\mathrm{F} ClF\mathrm{Cl}-\mathrm{F} Br-F KF\mathrm{K}-\mathrm{F} FF\mathrm{F}-\mathrm{F}

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Problem 1457

Resources
Figure A and Figure B represent examples of different types of chemical bonding. Identify the descriptions and properties Chat best represent each figure. All of the descriptions and properties may not be used.
Figure A nonpolar covalent equal sharing of electrons
Figure B unequal sharing of electrons Answer Bank NH\mathrm{N}-\mathrm{H} bond NaCl\mathrm{Na}-\mathrm{Cl} bond ClCl\mathrm{Cl}-\mathrm{Cl} bond ionic transfer of electrons

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Problem 1458

Question 7
Evaluate the following expressions.
1 (a) log3313=\log _{3} 3^{13}= \square (b) log381=\log _{3} 81= \square (c) log4256=\log _{4} 256= \square (d) log5510=\log _{5} 5^{10}= \square

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Problem 1459

? ( webassign.net
6. [-/5 Points] DETAILS MY NOTES TANFIN12 6.2.030.

Refer to the following Venn diagram.
Find the following. (a) n(ABC)n\left(A \cup B^{C}\right) \square (b) n[A(BC)C]n\left[A \cap(B \cup C)^{C}\right] \square (c) n(AC)n\left(A^{C}\right) \square (d) n[(ABC)c]n\left[(A \cup B \cup C)^{c}\right] \square (e) n(ACBCCC)n\left(A^{C} \cup B^{C} \cup C^{C}\right) \square Stow My Work

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Problem 1460

Determine all values of aa for which the following set of vectors is dependent or independent. You can select 'always', 'never', ' a=a= ', or ' aa \neq ', then specify a value or comma-separated list of values. {[131a],[1301],[2612]}\left\{\left[\begin{array}{c} 1 \\ 3 \\ -1 \\ a \end{array}\right],\left[\begin{array}{l} 1 \\ 3 \\ 0 \\ 1 \end{array}\right],\left[\begin{array}{l} 2 \\ 6 \\ 1 \\ 2 \end{array}\right]\right\}
Dependent: Always
Independent: Always SUBMIT AND MARK SAVE AND CLOS

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Problem 1461

Question 4 [10 points] Determine all values of aa for which the following set of vectors is dependent or independent. You can select 'always', 'never', ' a=a= ', or ' aa \neq ', then specify a value or comma-separated list of values. {[a123],[2615],[48102]}\left\{\left[\begin{array}{c} a \\ 1 \\ -2 \\ -3 \end{array}\right],\left[\begin{array}{c} 2 \\ 6 \\ 1 \\ -5 \end{array}\right],\left[\begin{array}{c} 4 \\ -8 \\ -10 \\ -2 \end{array}\right]\right\}
Dependent: Always Independent: Always

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Problem 1462

Здесь всюоду A,B,A, B, \ldots, это какие-то непустые подмножества на прямой R\mathbb{R}. (1) Используя лишь определение компактности доказите, что (a) прямая R\mathbb{R} не компактна,

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Problem 1463

множество А компактно, где A={23}{2n23n+13n2n+10,n=1,2,3,}A=\left\{\frac{2}{3}\right\} \cup\left\{\frac{2 n^{2}-3 n+1}{3 n^{2}-n+10}, n=1,2,3, \ldots\right\}

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Problem 1464

(2) Докажите, что переселение любого семейства компактных подмнозеств компактно.

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Problem 1465

The heart rate of runners during a long distance race is approximately normal. The table below shows the heart rates of a random sample of 9 such runners. Find the point estimate. 116122106132126149109145134\begin{array}{lllllllll} 116 & 122 & 106 & 132 & 126 & 149 & 109 & 145 & 134 \end{array} \square (round to 1 decimal place)

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Problem 1466

Докажите, что множество [0,1)Q[0,1) \cap \mathbb{Q} не компактно.

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Problem 1467

espacio un juo se la esuestral? 4) 12 B) 24 C) 144 D) 288

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Problem 1468

Pary 2: Long Answer Questions. 24 marks Answer ALL questions in the space provided. Show ALL working to receive FULL credit.
1. Place and label these rational numbers on the number line below: (5 marks) 4.124,34,312,118,0.9-4.124, \frac{-3}{4}, 3 \frac{1}{2}, \frac{-11}{8}, 0 . \overline{9}

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Problem 1469

Answer ALL questions in the space provided. Show ALL working to receive FULL credit
1. Place and label these rational numbers on the number line below: 4.124,34,312,118,0.9-4.124, \frac{-3}{4}, 3 \frac{1}{2}, \frac{-11}{8}, 0 . \overline{9} (5 marks)

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Problem 1470

Classify each bond as nonpolar covalent, polar covalent, or ionic. \begin{tabular}{|cc} \hline Atom & Electronegativity \\ \hline C & 2.5 \\ S & 2.5 \\ I & 2.5 \\ Cl & 3.0 \\ Se & 2.4 \\ \hline \end{tabular}
Clear A
C-Se SCl\mathrm{S}-\mathrm{Cl} ionic C-I

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Problem 1471

Find the highest common factor of the numbers 45, 120, and 180.

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Problem 1472

Exercise 4 1) Give the electronic configuration of the following elements: 17Cl,37Rb,29Cu,42Mo,15P{ }_{17} \mathrm{Cl}^{-},{ }_{37} \mathbf{R b},{ }_{29} \mathbf{C u},{ }_{42} \mathbf{M o},{ }_{15} \mathbf{P}^{-} 2) Locate these elements in the periodic table. 3) Indicate the most stable ion for each of these elements, justifying your choice. 4) Arrange these elements in order. -Decreasing their electronegativity and their first ionization energy. -Increasing their covalent radius.

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Problem 1473

Reuben won a charity raffle. His prize will be randomly selected from the 9 prizes shown below. The prizes include 3 rings, 1 camera, and 5 headsets. (a) Find the odds against Reuben winning a ring. \square (b) Find the odds in favor of Reuben winning a ring. \square Explanation Check

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Problem 1474

Finding the odds in favor and against
Mary won a charity raffle. Her prize will be randomly selected from the 9 prizes shown below. The prizes include 4 rings, 1 camera, and 4 headsets. Prizes 0000 (1) (1) (1) (a) Find the odds against Mary winning a ring. \square (b) Find the odds in favor of Mary winning a ring. \square Explanation Check o 2024 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy

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Problem 1475

Ushirimi 1(3+7=101 \quad(3+7=10 pikd do jenes anetare te komunitetit it zejedhur? b) NE dy grupe tö studiuarn rezultol se: GI pêrbęhet proj 100 personash nga tê cilet 60 janê njohês te kompjuterit ka njohuri ; G2 pêrbêhet prej 50 personave nga té cilet 20 janê njohês té kompjutert dive pjesa tjeter nuk ka. zagidhet rastésisht nje person . 1 -Sa Eshic probnbibiliteti qe ai njeh kompjuterin? 2-Recultoi se personi i zgiedhus

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Problem 1476

Use the figure shown for the following exercises.
1. Find ABBd\overline{A B} \cup \overline{B d}.

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Problem 1477

Consider the following data representing the daily calorie intake for dieters. 1261,1253,1348,1280,1334,1305,1346,1192,1358,1133,1343,1343,1156,1359,1281,1249,1152,1103,1128,1253,13861261,1253,1348,1280,1334,1305,1346,1192,1358,1133,1343,1343,1156,1359,1281,1249,1152,1103,1128,1253,1386 \begin{tabular}{|c|l|l|l|l|l|} \hline \multicolumn{5}{|c|}{ Daily Calorie Intake for Dieters } \\ \hline Class & Frequency & Class Boundaries & Midpoint & Relative Frequency & Cumulative Frequency \\ \hline 108811371088-1137 & & & & & \\ \hline 113811871138-1187 & & & & & \\ \hline 118812371188-1237 & & & & & \\ \hline 123812871238-1287 & & & & & \\ \hline 128813371288-1337 & & & & & \\ \hline 133813871338-1387 & & & & & \\ \hline \end{tabular}
Step 2 of 7 : Determine the frequency of the second class. Tables Answer \square

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Problem 1478

Fifteen students were selected and asked how many hours each studied for the final exam in statistics. Their answers are recorded here. 2690239497710416\begin{array}{lllllllllllllll}2 & 6 & 9 & 0 & 2 & 3 & 9 & 4 & 9 & 7 & 7 & 10 & 4 & 1 & 6\end{array} Send data to Excel
Find the range, variance, and standard deviation. Round the variance to one decimal place and the standard deviation to two decimal places, if necessary.
The range is \square 10 hours.
Part: 1/31 / 3
Part 2 of 3
The variance is \square

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Problem 1479

The stock prices for eight major grocery store chains last January were: \begin{tabular}{llllllll} $18.28\$ 18.28 & $20.32\$ 20.32 & $9.36\$ 9.36 & $11.55\$ 11.55 & $11.23\$ 11.23 & $48.06\$ 48.06 & $48.84\$ 48.84 & $28.23\$ 28.23 \end{tabular} Send data to Excel
Find the range, variance, and standard deviation. Round the variance to one decimal place and the standard deviation to two decimal places, if necessary.
Part: 0/30 / 3
Part 1 of 3
The range is $\$ \square .

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Problem 1480

These data are the number of junk e-mails Lena received for 9 consecutive days. 591144282059\begin{array}{lllllllll} 59 & 1 & 1 & 4 & 4 & 28 & 20 & 5 & 9 \end{array} Send data to Excel
Find the range, variance, and standard deviation. Round the variance to one decimal place and the standard deviation to two decimal places, if necessary. Part: 0/30 / 3
Part 1 of 3
The range is \square e-mails.

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Problem 1481

The weights (in pounds) of nine players from a college football team are recorded as follows. 208211305295267288303253261\begin{array}{lllllllll} 208 & 211 & 305 & 295 & 267 & 288 & 303 & 253 & 261 \end{array} Send data to Excel
Find the range, variance, and standard deviation. Round the variance to one decimal place and the standard deviation to two decimal places, if necessary. Round intermediate calculations to one decimal place.
Part: 0/30 / 3
Part 1 of 3
The range is \square pounds.

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Problem 1482

Ten used trail bikes are randomly selected from a bike shop, and the odometer reading of each (in miles) is recorded as follows. 19021036531899782359218369223658\begin{array}{lllllllllll}1902 & 103 & 653 & 1899 & 782 & 359 & 218 & 369 & 223 & 658\end{array} Send data to Excel
Find the range, variance, and standard deviation. Round the variance to one decimal place and the standard deviation to two decimal places, if necessary. Part: 0/30 / 3
Part 1 of 3
The range is \square miles.

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Problem 1483

The scores for 20 students on a 50 -point math test are 42,33,50,32,48,46,47,39,40,37,45,38,43,30,35,31,41,44,4942,33,50,32,48,46,47,39,40,37,45,38,43,30,35,31,41,44,49, and 36 .
Part: 0/30 / 3
Part 1 of 3 (a) Find the percentile rank for a score of 47.
A test score of 47 is equivalent to the \square percentile.

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Problem 1484

The scores for 20 students on a 50 -point math test are 49,50,37,44,27,47,43,35,41,31,42,40,38,45,39,33,46,36,3249,50,37,44,27,47,43,35,41,31,42,40,38,45,39,33,46,36,32, and 48 .
Part: 0/30 / 3
Part 1 of 3 (a) Find the percentile rank for a score of 31.
A test score of 31 is equivalent to the \square th(st/nd/rd) percentile.

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Problem 1485

The scores for 20 students on a 50 -point math test are 49,50,37,44,27,47,43,35,41,31,42,40,38,45,39,33,46,36,3249,50,37,44,27,47,43,35,41,31,42,40,38,45,39,33,46,36,32 and 48 .
Part: 0/30 / 3
Part 1 of 3 (a) Find the percentile rank for a score of 31.
A test score of 31 is equivalent to the \square percentile.

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Problem 1486

b. Suppose children at a summer camp are each given a credit of $20\$ 20 at the snack shop, where purchases are recorded but no cash is exchanged. This is an example of money as a(n)a(n) \qquad . (Select the two that apply.) A. double coincidence of wants B. store of value C. medium of exchange D. unit of account E. near money

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Problem 1487

A square matrix AA is idempotent if A2=AA^{2}=A. Let VV be the vector space of all 2×22 \times 2 matrices with real entries. Let HH be the set of all 2×22 \times 2 idempotent matrices with real entries. Is HH a subspace of the vector space VV ?
1. Does HH contain the zero vector of VV ? choose
2. Is HH closed under addition? If it is, enter CLOSED. If it is not, enter two matrices in HH whose sum is not in HH, using a comma separated list and syntax such as [[1,2],[3,4]],[[5,6],[7,8]][[1,2],[3,4]],[[5,6],[7,8]] for the answer [1234],[5678]\left[\begin{array}{ll}1 & 2 \\ 3 & 4\end{array}\right],\left[\begin{array}{ll}5 & 6 \\ 7 & 8\end{array}\right]. (Hint: to show that HH is not closed under addition, it is sufficient to find two idempotent matrices AA and BB such that (A+B)2(A+B)(A+B)^{2} \neq(A+B).) \square
3. Is HH closed under scalar multiplication? If it is, enter CLOSED. If it is not, enter a scalar in R\mathbb{R} and a matrix in HH whose product is not in HH, using a comma separated list and syntax such as 2,[[3,4],[5,6]]2,[[3,4],[5,6]] for the answer 2,[3456]2,\left[\begin{array}{ll}3 & 4 \\ 5 & 6\end{array}\right]. (Hint: to show that HH is not closed under scalar multiplication, it is sufficient to find a real number rr and an idempotent matrix AA such that (rA)2(rA)(r A)^{2} \neq(r A).) \square
4. Is HH a subspace of the vector space VV ? You should be able to justify your answer by writing a complete, coherent, and detailed proof based on your answers to parts 1-3. choose

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Problem 1488

\begin{tabular}{|c|c|c|} \hline \multirow{2}{*}{} & \multicolumn{2}{|c|}{ Integer? } \\ \cline { 2 - 3 } & Yes & No \\ \hline-50 & & \\ \hline1817\frac{18}{17} & & \\ \hline-37.9 & & \\ \hline546\frac{54}{6} & & \\ \hline-987.72 & & \\ \hline \end{tabular}

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Problem 1489

A historian finds marriage records from 180018201800-1820 showing an average age of 26.7. Answer these questions about the data.

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Problem 1490

A historian estimates the average age at marriage of men (1800-1820): average age is 26.7 years, range is 25.8-27.6 years.
a. What summarizes the data? b. What infers about the population? c. What population is referred to? d. Is 26.7 a statistic or parameter?

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Problem 1491

In a poll of 1,002 women, 46%46\% favored using federal tax dollars for embryo research. Identify the population and sample.

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Problem 1492

Classify the data on defective circuits per CPU in a sample of 100. Is it qualitative or quantitative, discrete or continuous, and what is its measurement level?

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Problem 1493

Classify the data on the number of people quitting smoking yearly for 10 years as qualitative/quantitative, discrete/continuous, and level of measurement.

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Problem 1494

Five people take tickets in a bakery. Are the data qualitative or quantitative? Discrete or continuous? Highest measurement level?

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Problem 1495

Is the card suit data qualitative or quantitative? Is it discrete or continuous? What is the highest level of measurement?

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Problem 1496

Is the handedness survey data qualitative or quantitative? Is it discrete or continuous? What is the highest measurement level?

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Problem 1497

Is heart rate data qualitative or quantitative? Is it discrete or continuous? What is the highest measurement level: nominal, ordinal, interval, or ratio?

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Problem 1498

Identify which of these are functions: f(x)=x5f(x)=|x-5| and the set {(5,6),(2,8),(0,4),(8,8)}\{(-5,6),(-2,8),(0,4),(8,8)\}.

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Problem 1499

When will both the soccer team (every 3 days) and basketball team (every 5 days) play on the same day again? A. 3 days B. 6 days C. 15 days D. 18 days

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Problem 1500

Choose a number to pair with 6 that is relatively prime: A. 6, B. 5, C. 12.

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