For Exercises 23–30, assume that the ANOVA assumptions are verified.

For the ANOVA table indicated in Exercises 23–28, test whether the population means differ, using the -value method and .

Question 12.23

23. ANOVA table from Exercise 15

12.1.23

versus Not all the population means are equal.

Reject if the .

.

.

The is not . Therefore we do not reject . There is not enough evidence to conclude at level of significance that the population means are not all equal.