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An economist wishes to determine whether people are driving less than in the past. In one region of the country, the number of miles driven
An economist wishes to determine whether people are driving less than in the past. In one region of the country, the number of miles driven per household per year in the past was 18.59 thousand miles. A sample of 15 households produced a sample mean of 16.23 thousand miles for the last year, with sample standard deviation of 4.06 thousand miles. Assuming a normal distribution of household driving distances per year, perform the relevant hypothesis test at the 5% level of significance.
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