Question

Let p equal the proportion of drivers who use a seat belt in a state that does not have a mandatory seat belt law. It was claimed that p = 0.14. An advertising campaign was conducted to increase this proportion. Two months after the campaign, y = 104 out of a random sample of n = 590 drivers were wearing their seat belts. Was the campaign successful?
(a) Define the null and alternative hypotheses.
(b) Define a critical region with an α = 0.01 significance level.
(c) What is your conclusion?


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  • CreatedOctober 12, 2015
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