A researcher randomly sampled 30 graduates, 18 males and 12 females, of an MBA program and recorded data concerning their starting salaries. Of primary interest to the researcher was the effect of gender on starting salaries. Statistics of the mean salaries of the females and males in the sample were computed. The sample standard deviations suggest that the variability of starting salaries of the two groups is almost the same. Suppose the starting salaries from both groups can be considered as normally distributed. Which of the following tests will be the most appropriate?
A) pooled-variance t test
B) separate-variance t test
C) paired t test
D) Wilcoxon rank sum test

Question

Quizplus · Accepted Answer

Since the sample standard deviations are similar and the data is normally distributed, a pooled-variance t test is appropriate for comparing the means of two independent groups.

A Researcher Randomly Sampled 30 Graduates, 18 Males and 12