SCENARIO 11-3
-True or False: Referring to Scenario 11-3, based on the Tukey-Kramer procedure with an overall
level of significance of 0.05, the retailer would decide that the mean speed for the Tornado brand
is significantly different from each of the mean speeds for other brands.

Question

SCENARIO 11-3 
-True or False: Referring to Scenario 11-3, based on the Tukey-Kramer procedure with an overall
level of significance of 0.05, the retailer would decide that the mean speed for the Tornado brand
is significantly different from each of the mean speeds for other brands.

Quizplus · Accepted Answer

The Tukey-Kramer procedure is a multiple comparison procedure that can be used to compare the means of multiple groups. In this case, the retailer is comparing the mean speeds of four different brands of tires. The overall level of significance is 0.05, which means that the retailer is willing to accept a 5% chance of making a Type I error (i.e., concluding that there is a significant difference when there is actually no difference).The Tukey-Kramer procedure is a pairwise comparison procedure, which means that it compares each pair of means. In this case, there are six possible pairwise comparisons: Tornado vs. Michelin, Tornado vs. Goodyear, Tornado vs. Bridgestone, Michelin vs. Goodyear, Michelin vs. Bridgestone, and Goodyear vs. Bridgestone.The Tukey-Kramer procedure uses a critical value to determine whether or not a difference between two means is significant. The critical value is calculated using the overall level of significance and the number of pairwise comparisons. In this case, the critical value is 3.46.The retailer would decide that the mean speed for the Tornado brand is significantly different from each of the mean speeds for other brands because the difference between the mean speed for the Tornado brand and the mean speed for each of the other brands is greater than the critical value.

SCENARIO 11-3 -True or False: Referring to Scenario 11-3, Based on the Based