Suppose you want to take a random sample of GMAT test scores to determine whether there is
Question:
Suppose you want to take a random sample of GMAT test scores to determine whether there is any significant difference between the GMAT scores for the test given in March and the scores for the test given in June. You gather the following data from a sample of persons who took each test. Use the Mann-Whitney U test to determine whether there is a significant difference in the two test results. Let α = .10. March . June 540 ... 350 570 ... 470 600 ... 630 430 ... 590 500 ... 610 510 ... 520 530 ... 460 560 ... 550 550 ... 530 490 ... 570
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