The printout in Figure 8.4 on page 373 gives information on Tukey€™s test, using PROC GLM in SAS, for the aggregate data in Example 8.1. Give conclusions regarding paired comparisons using Tukey€™s test results.

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The GLM Procedure Tukey's Studentized Range (HSD) Test for moisture NOTE: This test controls the Type I experimentwise error rate, but it generally has a higher Type II error rate than REGWQ . Alpha Error Degrees of Freedom Error Mean Square 0.05 25 4960.813 Critical Value of Studentized Range 4.15336 Minimum Significant Difference 119.43 Means with the same letter are not significantly different. Tukey Grouping Mean aggregate 610.67 6 5 A 610.50 A 6. 3 A B A 569.33 B A 553.33 B A B 465.17 B Figure 8.4: SAS printout for Exercise 8.21.