Question: Using Table E.8, determine the lower- and upper-tail critical values for the Wilcoxon rank sum test statistic T1 in each of the following two-tail tests:

Using Table E.8, determine the lower- and upper-tail critical values for the Wilcoxon rank sum test statistic T1 in each of the following two-tail tests:

a. α 5 0.10, n1 5 5, n2 5 9

b. α 5 0.05, n1 5 5, n2 5 9

c. α 5 0.01, n1 5 5, n2 5 9

d. Given your results in

(a) to (c), what do you conclude regarding the width of the region of non-rejection as the selected level of significance α gets smaller?

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