Chapter 11.1, Problem 18E

For Exercises 5 through 18, perform these steps.

a. State the hypotheses and identify the claim.

b. Find the critical value.

c. Compute the test value.

d. Make the decision.

e. Summarize the results.

18. Education Level and Health Insurance A researcher wishes to see if the number of randomly selected adults who do not have health insurance is equally distributed among three categories (less than 12 years of education, 12 years of education, more than 12 years of education). A sample of 60 adults who do not have health insurance is selected, and the results are shown. At α = 0.05, can it be concluded that the frequencies are not equal? Use the P-value method. If the null hypothesis is rejected, give a possible reason for this.

Source: U.S. Census Bureau.