STAT TECH IN BUSINESS & ECON LL\AC
STAT TECH IN BUSINESS & ECON LL\AC
18th Edition
ISBN: 9781264720545
Author: Lind
Publisher: MCG
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Chapter 16, Problem 16E
To determine

State the conditions that are necessary to use Kruskal–Wallis test instead of Wilcoxon rank-sum test.

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suppose you and a friend each take different random samples of data pairs (x,y) from the same popuation. Assumethe samples are the same size. Based on your samples, you compute r=0.83. Based on her sample, your friend computes r=0.79. Is your friends value for r wrong?
A medical researcher wishes to try three different techniques to lower blood pressure of patients with high blood pressure. The subjects are randomly selected and assigned to one of three groups. Group 1 is given medication, Group 2 is given an exercise program, and Group 3 is assigned a diet program. At the end of six weeks, the reduction in each subject's blood pressure is recorded. Use the Kruskal-Wallis test to find the critical value to test the claim that there is no difference in the distribution of the populations. Use a = 0.05. Group 1 Group 2 Group 3 14 11 9. 15 8 15 12 7 18 11 16 7 12 11 3 7 ..... О А. 3.195 О В. 1.960 OC. 4.153 O D. 5.991
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