American workers spend an average of 46 minutes to and from work in a typical da

Question

American workers spend an average of 46 minutes to and from work in a typical day.  In a sample of n = 81 employed adults in Indianapolis metropolitan area (IMA), the average commuting time to work was x? = 40.5 minutes, with s = 21.6 minutes.  Is there enough evidence, at ? = 0.05, to conclude that the average commuting time in IMA is less than the national average?

To   perform a hypothesis test, the null and alternative hypotheses for this test   are: A H?: ? > 46 H?: ? ? 46 B H?: ? < 46 H?: ? ? 46 C H?: ? ? 46 H?: ? > 46 D H?: ? ? 46 H?: ? < 46

Explanation / Answer

D

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