A recent study posed the question about whether Japanese managers are more motivated than American managers.A randomly selected sample of each was administered the Sarnoff Survey of Attitudes Toward Life (SSATL),which measures motivation for upward mobility.The SSATL scores are summarized below. Judging from the way the data were collected,which test would likely be most appropriate?
A)Related samples t-test for mean difference
B)Pooled-variance t-test for the difference in means
C)Independent samples Z-test for the difference in means
D)Related samples Z-test for mean difference

Question

A recent study posed the question about whether Japanese managers are more motivated than American managers.A randomly selected sample of each was administered the Sarnoff Survey of Attitudes Toward Life (SSATL),which measures motivation for upward mobility.The SSATL scores are summarized below.  Judging from the way the data were collected,which test would likely be most appropriate?
A)Related samples t-test for mean difference 
B)Pooled-variance t-test for the difference in means 
C)Independent samples Z-test for the difference in means 
D)Related samples Z-test for mean difference

Quizplus · Accepted Answer

Since the study involved two separate groups (Japanese managers and American managers) who are not related to each other, an Independent samples test is appropriate. Furthermore, the sample sizes are sufficiently large so we can use a z-test. Option A is incorrect because related samples t-test is used when the same set of participants are measured twice. Option B is incorrect since we don't know for sure that the population variances are equal. Option D is also incorrect as it is used for paired samples.

A Recent Study Posed the Question About Whether Japanese Managers