Specify the rejection region for the Wilcoxon rank sum test for independent samples in each of the following situations:
a. H0: Two probability distributions, 1 and 2, are identical Ha: The probability distribution for population 1 is shifted to the right or left of the probability distribution for population 2 n1 = 7, n2 = 8, α = .10
b. H0: Two probability distributions, 1 and 2, are identical Ha: The probability distribution for population 1 is shifted to the right of the probability distribution for population 2 n1 = 6, n2 = 6, α = .05
c. H0: Two probability distributions, 1 and 2, are identical Ha: The probability distribution for population 1 is shifted to the left of the probability distribution for population 2 n1 = 7, n2 = 10, α = .025
d. H0: Two probability distributions, 1 and 2, are identical Ha: The probability distribution for population 1 is shifted to the right or left of the probability distribution for population 2 n1 = 20, n2 = 20, α = .05
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