A consumer organization wants to compare the prices charged for a particular dishwasher in 3 types of stores in a suburban county: discount stores, department stores, and appliance stores. Random samples of 4 discount stores, 6 department stores, and 5 appliance stores were selected. The results were as shown.

At the .05 level of significance, is there any evidence of a difference in the average price between the types of stores? Use the MINITAB commands presented in Fig. 12.2 to answer this question.

Fig. 12.2

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Discount 12 14 16 15 Department 15 18 18 14 18 15 Appliance 15 18 16 16 19