Are Japanese managers more motivated than American managers? A randomly selected group of 100 managers from each group were administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation for upward mobility. The average and standard deviation of the SSATL scores are computed. The standard deviations of the SSATL scores suggest that the standard deviation from the two groups is very different. Which of the following tests will be the most appropriate?
A) pooled-variance t test
B) Z test for proportion
C) separate-variance t test
D) t test for mean

Question

Quizplus · Accepted Answer

Since the standard deviations of the SSATL scores for the two groups are very different, a separate-variance t test would be the most appropriate choice. A pooled-variance t test assumes equal variances in the two groups, which is not the case here. The Z test for proportion is not applicable as this study does not involve proportions. The t test for mean would be appropriate if the standard deviations were similar, but since they are not, a separate-variance t test is the better option.

Are Japanese Managers More Motivated Than American Managers? a Randomly