Chapter 8.3, Problem 21E

For Exercises 7 through 23, perform each of the following steps.

a. State the hypotheses and identify the claim.

b. Find the critical value(s).

c. Find the test value.

d. Make the decision.

e. Summarize the results.

Use the traditional method of hypothesis testing unless otherwise specified.

21. Doctor Visits A report by the Gallup Poll stated that on average a woman visits her physician 5.8 times a year. A researcher randomly selects 20 women and obtained these data.

At α = 0.05, can it be concluded that the average is still 5.8 visits per year? Use the P-value method.