Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Chapter 10.6, Problem 177E
Understanding the Concepts and Skills
10.177 Suppose that you want to perform a hypothesis test based on a simple random paired sample to compare the means of two populations and you know that the paired-difference variable has a symmetric distribution that is far from normal.
- a. Is use of the paired t-test acceptable if the
sample size is small or moderate? Why or why not?1 - b. Is use of the paired t-test acceptable if the sample size is large? Why or why not?
- c. Is use of [he paired Wilcoxon signed-rank test acceptable? Why or why not?
- d. If both the paired t-test and the paired Wilcoxon signed-rank test are acceptable, which test is preferable? Explain your answer.
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Client
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Weight before
diet (pounds)
Weight after
diet (pounds)
128
120
2
131
123
3
140
141
4
178
170
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121
118
6
136
136
7
118
121
8
136
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Chapter 10 Solutions
Introductory Statistics (10th Edition)
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