Question: An apple juice manufacturer has developed a new product. The marketing manager has to decide how to market the new product: She can create advertising that emphasizes convenience, quality, or price. To facilitate a decision, she conducts an experiment in three different cities. In one city, she launches the product with advertising stressing the convenience of the product. In the second city, the advertisements emphasize the quality of the product. Advertising the low price of the product is used in the third city. The number of packages sold weekly is recorded for the 20 weeks, and these data are listed below.

a. Use Minitab to determine if difference exists in the mean sales for these three cities (i.e., advertising different features of the product). Test at the 0.05 significance level.

b. If you reject Ho in part (a), then perform a test after ANOVA to determine which mean(s) are different (Keep overall significance level at 0.05).