Chapter 13.5, Problem 8E

For Exercises 1 through 12, use the Kruskal-Wallis test and perform these steps.

a. State the hypotheses and identify the claim.

b. Find the critical value.

c. Compute the test value.

d. Make the decision.

e. Summarize the results.

Use the traditional method of hypothesis testing unless otherwise specified.

8. Printer Costs An electronics store manager wishes to compare the costs (in dollars) of three types of computer printers. The randomly selected data are shown. At α = 0.05, can it be concluded that there is a difference in the prices? Based on your answer, do you think that a certain type of printer generally costs more than the other types?