A local consumer reporter wants to compare the average costs…
A local consumer reporter wants to compare the average costs of grocery items purchased at three different supermarkets – Kroger, Giant Eagle, and Meier. Prices (in dollars) were recorded for a sample of 60 randomly selected grocery items at each of the three supermarkets. In order to reduce item-to-item variation, the prices were recorded for each item on the same day at each supermarket. Item Kroger Giant Eagle Meier 1) Big Thirst Towel $1.21 $1.49 $1.59 2) Post Golden Crisp 2.78 2.99 3.35 3) Tylenol Tablets 5.98 5.29 5.98 . . . . . . . . 59) Colgate Shave 0.94 1.10 1.19 60) Kidney Beans 0.45 0.56 0.38 The results of the Analysis of Variance for this experiment are as follows: Source df SS MS F Total 222.21 Supermarket 2.64 1.32 39.23 Item 215.59 3.65 108.54 Error 3.97 0.0337 What are the correct degrees of freedom for total, supermarket, item, and error, respectively?