Discussion:
Q: Let p equal the proportion of drivers who use a seat belt in a country 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) Determine the approximate p-value and state your conclusion.