Introduction to Probability and Statistics
Introduction to Probability and Statistics
14th Edition
ISBN: 9781133103752
Author: Mendenhall, William
Publisher: Cengage Learning
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Chapter 15, Problem 15.56SE
To determine

To test: the hypothesis of no differenceexistinthe distribution of response time for two stimuli using Wilcoxon signed-rank.

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Omega-3, finis Exercises 21 and 23 describe an experi-ment investigating the effectiveness of omega-3 fats in treating bipolar disorder. Suppose some of the 30 sub-jects were very active people who walked a lot or got vig-orous exercise several times a week, while others tended to be more sedentary, working office jobs and watchinga lot of TV. Why might researchers choose to block thesubjects by activity level before randomly assigning themto the omega-3 and placebo groups?
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