Where to Shop?, continued Refer to Exercise 11.43. The printout that follows provide...

Where to Shop?, continued Refer to Exercise 11.43. The printout that follows provides the average costs of the selected items for the k _ 4 stores.

a. What is the appropriate value of for testing for differences among stores?

b. What is the value of ?

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

Reference:

Where to Shop? Do you shop at the grocery store closest to home or do you look for the store that has the best prices? We compared the regular prices at four different grocery stores for eight items purchased on the same day.

a. What are the blocks and treatments in this experiment?

b. Do the data provide evidence to indicate that there are significant differences in prices from store to store? Support your answer statistically using the ANOVA printout that follows.

c. Are there significant differences from block to block? Was blocking effective?