Question: Refer to Exercise 6 31 a What is the level of

Refer to Exercise 6.31.
a. What is the level of significance of the Wilcoxon signed-rank test?
b. Compare the levels of significance of the Wilcoxon signed-rank test, paired t test, and sign test for the data set in Exercise 6.31?
c. Place a 95% confidence interval on the mean difference between the responses from the two treatments.
d. Which of the three procedures, the Wilcoxon signed-rank test, paired t test or sign test, appears to be most valid test for this study?



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