Problem 4. A consumer wanted to know whether there is a difference in the price of a particular toy at three different types of stores. The table below shows the price of the toy in a sample of 15 stores (5 of each type). Discount Variety Department $12 $15 $19 13 17 17 14 14 16 12 18 20 15 17 19 a. Setup the appropriate null and alternative hypotheses. b. Construct the relevant test statistic without using the ANOVA procedure in Excel. c. Test the hypotheses at the 0.05 signicance level and state your conclusion