The marketing department of a company has designed three different boxes for its product. It wants to determine which box will produce the largest amount of sales. Each box will be test marketed in five different stores for a period of a month. You are given the information on sales in the file, Store.

a)State the null and alternative hypotheses.

b)Construct an ANOVA table.

c)What conclusion do you draw? Is there any box and store that produces a different amount of sales?

d)Use Fisher's LSD procedure and determine which mean (if any) is different from the others. Let = 0.05.

Store Box 1 Box 2 Box 3

1 210 195 295

2 230 170 275

3 190 200 290

4 180 190 275

5 190 193 265