Question: Using the computer output, perform pairwise comparisons of the treatment means in Exercise 11.8 by (1) Using Tukey simultaneous 95 percent confidence intervals (2) Optionally

Using the computer output, perform pairwise comparisons of the treatment means in Exercise 11.8 by (1) Using Tukey simultaneous 95 percent confidence intervals (2) Optionally using t statistics and critical values ( see the right side of Figure 11.6 and page 416). Which brands are most durable? Find and interpret a 95 percent confidence interval for each of the treatment means.

SUMMARY Groups Count Sum Average Varlance Alpha Best Century Divot Tukev simultaneous comparison t-values (d.f. 16) Century Alpha Best Divot 306.4 336.6 5 1268 253.6 5 1532 306.4 740.3 5 1209 241.8 49.7 5 1683 336.6 609.3 Century 241.8 Alpha 253.6 331 5.33 Best 306.4 605.3 336.6 -6,09 6.09 1.94 Critical values for experimentwise error rate: 2.86 3.67 ANOVA Source of Varlation S df Between Groups 29860.4 3 9953.466716.420798 3.853E-05 3.2388715 Within Groups Total F P-Value 0.05 0.01 MS F crit 9698.4 16 606.15 39558.8 19

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