Marathon Times A random sample of males who finished the New York marathon is partitioned into three categories with ages of 21–29, 30–39, and 40 or over. The times

(in seconds) are obtained from Data Set 8 in Appendix B. The analysis of variance results obtained from Excel are shown below.

a. What is the null hypothesis?

b. What is the alternative hypothesis?

c. Identify the value of the test statistic.

d. Find the critical value for a 0.05 significance level.

e. Identify the P-value.

f. Is there sufficient evidence to support the claim that men in the different age categories have different mean times?