A sample of adults was asked how many miles per day they commute to work. The following MINITAB output presents the results of a hypothesis test regarding the mean number of miles commuted to work.

a. State the null and alternate hypotheses.

b. What is the value of x̄?

c. What is the value of s?

d. How many degrees of freedom are there?

e. Do you reject H0 at the 0.05 level? State a conclusion.

f. Someone wants to test the hypothesis H0: μ = 9 versus H1: μ > 9.

Use the information in the output to compute the t statistic for this test.

g. Compute the P-value for the test in part (f).

h. Can the null hypothesis in part

(f) be rejected at the 0.05 level? State a conclusion.

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Test of mu = 16 vs not = 16 N Mean 11 13.2874 StDev SE Mean 6.0989 1.8389 95% CI T P (9.1901, 17.3847) -1.48 0.171