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

Question:

Refer to Exercise 11.43. The printout that follows provides the average costs of the selected items for the k = 4 stores.
Store Mean
Vons................... 4.1350
Ralphs................... 4.3400
Stater................... 3.8525
WinCo................... 2.5975
a. What is the appropriate value of q.05(k, df) for testing for differences among stores?
b. What is the value of v ω = q.05(k, df) √MSE/b?
c. Use Tukey's pair wise comparison test among stores used to determine which stores differ significantly in average prices of the selected items.