Readability of Authors The Chapter Problem uses the Flesch Reading Ease scores for randomly selected pages from books by Tom Clancy, J. K. Rowling, and Leo Tolstoy.

If the Flesch-Kincaid Grade Level scores are used instead (see Data Set 14 in Appendix B), the analysis of variance results from Minitab are as shown in the accompanying table. Assume that we want to use a 0.05 significance level in testing the null hypothesis that the three authors have Flesch-Kincaid Grade Level scores with the same mean.

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. Based on the preceding results, what do you conclude about equality of the population means?

616 CHAPTER 11 Analysis of Variance