The claim and state H 0 and H a .

Question

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Answer 1

Question

Chapter 8.2, Problem 17E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region with α=0.01 .

c.

To determine

To find: The standardized test statistic t.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.05 .

e.

To determine

To interpret: The decision in the context of the original claim.

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14 A survey is conducted to determine whether would prefer to work at home, if given the 20 office employees of a certain company chance. The overall results are shown in the first bar graph, and the results broken down by gender are presented in the second. a. Interpret the results of each graph. b. Discuss the added value in including gen- der in the second bar graph. (The second bar graph in this problem is called a side by side bar graph and is often used to show results broken down by two or more variables.) c. Compare the side by side bar graph with the two pie charts that you made for Question 6. Which of the two methods is best for comparing two groups, in your opinion? A Would you prefer to work at home? (n=20) 60 50 40 Percent 20 30 20 30 10 0 No Yes Prefer to work at home? (10 males, 10 females) 80 Percent 60 00 40 40 20- No Yes No Yes Female Male

Frequency 12 Suppose that a random sample of 270 gradu- ating seniors are asked what their immediate priorities are, including whether buying a house is a priority. The results are shown in the following bar graph. a. The bar graph is misleading; explain why. b. Make a new bar graph that more fairly presents the results. Is Buying a House a Priority? 300 250 200 150 100 50 0 Yes No Undecided

Frequency 11 A polling organization wants to find out what voters think of Issue X. It chooses a random sample of voters and asks them for their opinions of Issue X: yes, no, or no opinion. I organize the results in the following bar graph. a. Make a frequency table of these results (including the total number). brocb. Evaluate the bar graph as to whether it biz s b fairly represents the results. of beau no STORE TO OW! vd wob spind 550 540 500 vd 480 420 360 300 250 240 Yes No Undecided Opinion on Issue X

Answer 2

Question

Chapter 8.2, Problem 17E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region with α=0.01 .

c.

To determine

To find: The standardized test statistic t.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.05 .

e.

To determine

To interpret: The decision in the context of the original claim.

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Answer 3

Question

Chapter 8.2, Problem 17E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region with α=0.01 .

c.

To determine

To find: The standardized test statistic t.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.05 .

e.

To determine

To interpret: The decision in the context of the original claim.

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Answer 4

Question

Chapter 8.2, Problem 17E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region with α=0.01 .

c.

To determine

To find: The standardized test statistic t.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.05 .

e.

To determine

To interpret: The decision in the context of the original claim.

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Answer 5

Chapter 8.2, Problem 17E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region with α=0.01 .

c.

To determine

To find: The standardized test statistic t.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.05 .

e.

To determine

To interpret: The decision in the context of the original claim.

Answer 6

Chapter 8.2, Problem 17E

a.

To determine

To identify: The claim and state H0 and Ha .

Answer 7

Chapter 8.2, Problem 17E

a.

To determine

To identify: The claim and state H0 and Ha .

Answer 8

b.

To determine

To find: The critical value and rejection region with α=0.01 .

Answer 9

b.

To determine

To find: The critical value and rejection region with α=0.01 .

Answer 10

c.

To determine

To find: The standardized test statistic t.

Answer 11

c.

To determine

To find: The standardized test statistic t.

Answer 12

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.05 .

Answer 13

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.05 .

Answer 14

e.

To determine

To interpret: The decision in the context of the original claim.

Answer 15

e.

To determine

To interpret: The decision in the context of the original claim.

Answer 16

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Answer 17

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Answer 18

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Answer 19

Ch. 8.1 - Classify each pair of samples as independent or...Ch. 8.1 - A survey indicates that the mean annual wages for...Ch. 8.1 - A travel agency claims that the average daily cost...Ch. 8.1 - What is the difference between two samples that...Ch. 8.1 - Explain how to perform a two-sample z-test for the...Ch. 8.1 - Describe another way you can perform a hypothesis...Ch. 8.1 - What conditions are necessary in order to use the...Ch. 8.1 - Prob. 5E Ch. 8.1 - Prob. 6E Ch. 8.1 - Independent and Dependent Samples In Exercises 58,...

The claim and state H 0 and H a .

Solution Summary: The author explains the claim that the mean household income in a recent year is greater in Cuyahoga County than it is in Wayne County.

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To identify: The claim and state H0 and Ha .

To find: The critical value and rejection region with α=0.01 .

To find: The standardized test statistic t.

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.05 .

To interpret: The decision in the context of the original claim.

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Chapter 8 Solutions