A Recent Study Posed the Question About Whether Japanese Managers

Multiple Choice

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