Question: Refer to Exercise 8.27. a. Use a nonparametric procedure to group the suppliers based on their mean deviations. Use an experimentwise error rate of .05.

Refer to Exercise 8.27.
a. Use a nonparametric procedure to group the suppliers based on their mean deviations. Use an experimentwise error rate of .05.
b. Use the Tukey’s W procedure to group the suppliers based on their mean deviations. Use an experimentwise error rate of .05.
c. Compare the two sets of groupings. Why is the nonparametric procedure more appropriate in this situation?

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