Refer to Exercise 15.37.
a. If this experiment was conducted again, would you recommend including the factor associated with center in your model and analysis?
b. What was the relative efficiency of the center factor in the analysis of the data in Exercise 15.37?
In exercise

-3-3 18 23-62 23 3 16 15 32 1 46 55-20 32 7 53 3-9-7 19 18-43-7-20 M 3 30-94-20 45 17 6 .30 3 4 5 26 A3-67 7 29-8-4 30 7-10-12-11-20 AZ-57 7 17 25 13 30 5 9 24 35-B-9-B-I-20 52 32 26 3 64 34-3-4-li-2 21-43 8 29 3-20 5 0 23 5-3-b 35-5-12 49 41 36 60 24 14 41 65 18-77 36 18 4 82 50 31 43 38 38-6 30 38-7-20-3-3-11 47713 5145 111222333444555