Refer to Exercise 11.43. The printout that follows provides the average costs of the selected items for the k = 5 stores.

Store                                      Mean
Albertsons...........................4.04125
Food-4-Less........................2.74125
Ralphs.................................3.30375
Stater Bros..........................3.05500
WinCo.................................2.08000

a. What is the appropriate value of q_.05(k, df) for testing for differences among stores?

b. What is the value of v = q_.05(k, df) √MSE/b?

c. Use Tukey’s pairwise comparison test among stores used to determine which stores differ significantly in average prices of the selected items.