7th Edition

ISBN: 9780135901021

Author: Larson

Publisher: PEARSON EDUCATION (COLLEGE)

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Chapter 8.4, Problem 12E

Testing the Difference Between Two Proportions In Exercises 7–12, (a) identify the claim and state H₀ and H_α, (b) find the critical value(s) and identify the rejection region(s), (c) find the standardized test statistic z. (d) decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim. Assume the samples are random and independent.

12. Seat Belt Use In a survey of 1000 drivers from the Midwest, 855 wear a seat belt. In a survey of 1000 drivers from the South, 909 wear a seat belt. At α = 0.10, can you support the claim that the proportion of drivers who wear seat belts in the Midwest is less than the proportion of drivers who wear seat belts in the South? (Adapted from National Highway Traffic Safety Administration)

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Chapter 8.4, Problem 11E

Chapter 8.4, Problem 13E

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Chapter 8 Solutions

MYLAB STATISTICS: ELEMENTARY STATISTICS

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,...

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Solution Summary: The alternative hypothesis indicates the claim.

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