Are Japanese managers more motivated than American managers? A randomly selected

Question

Are Japanese managers more motivated than American managers? A randomly selected group of each were administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation for upward mobility.

Judging from the way the data were collected, which test would likely be most appropriate to employ?

                                                        American                            Japanese

Sample Size                                          211                                      100

Mean SSATL Score                                 65.75                                   79.83

Population Std. Dev.                              11.07                                    6.41

A. Paired t Test

B. Pooled-variance t test for the difference between two means

C. Independant samples Z test for the difference between two means

D. Related samples Z test for the mean difference.

Explanation / Answer

C s= sqrt(?1^2/n1+?2^2/n2) Denominator of z = 0.995823 z = (65.75 - 79.83) = -14.08 / 0.995823 z =-14.1391 Using a 5% alpha level, the critical value is -1.64. z falls in the critical region. Therefore reject the null hypothesis. Conclusion based on this data: American managers are less motivated than Japanese managers Since the population standard deviations are known, we have used a Normal distribution rather than a t-distribution.

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