cording to a survey, the average American person is in a car for 5 hours per week. To test if the amount of car time in Los Angeles is less than the national average, a researcher decides to do a hypothesis test, at a 10% significance level. She surveys 15 Los Angeleans randomly and asks them about their amount of time in a car each week, on average. From the data, the sample mean time is 4.3 hours per week, and the sample standard deviation (s) is 0.7 hours. H0: μ≤5; Ha: μ>5. α=0.1 (significance level)

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