Question

According to the U.S. Federal Highway Administration, the mean distance traveled per shopping trip by Americans was 10.0 miles in 1983. A random sample of 25 shopping trips for this year gave a mean distance traveled of 12.0 miles with a population sample standard deviation (s) of 7.5 miles. Do the data provide sufficient evidence to conclude that this year’s mean distance traveled per shopping trip by Americans has increased from the 1983 mean of 10.0 miles? Use an alpha of 10%.

a)What is the Null Hypotheses Ho?



b)What is the Alternate Hypotheses H1?

Ho: mean1 = mean2

H1: mean1 < mean2 (Since you are only concerned with an increase, it is a one-tailed test.)

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