In a survey of 480 drivers from the South, 408 wear a seat belt. In a survey
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In a survey of 480 drivers from the South, 408 wear a seat belt. In a survey of 360 drivers from the Northeast, 288 wear a seat belt. At α = 0.05, can you support the claim that the proportion of drivers who wear seat belts is greater in the South than in the Northeast?
(a) Identify the claim and state H0 and Ha,
(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,
(e) Interpret the decision in the context of the original claim. Assume the samples are random and independent. If convenient, use technology.
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Related Book For
Elementary Statistics Picturing The World
ISBN: 9780321911216
6th Edition
Authors: Ron Larson, Betsy Farber
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