Redo Exercise 5 from Chapter 7 using the rank-sum test instead of a t test. Does your
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Data from exercise 5
Suppose that the industrial psychologist from the previous exercise is testing the difference in performance on the job-selection test of two different ethnic groups. Given the following data, can the psychologist reject the null hypothesis (alpha = .05) that the population means of these two groups are the same for the job-selection test she is investigating? If these results are statistically significant, compute the 95% CI for the difference of the population means.
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Introductory Statistics For The Behavioral Sciences
ISBN: 9780470907764
7th Edition
Authors: Joan Welkowitz, Barry H. Cohen, R. Brooke Lea
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