n1 = 25, n2 = 32, S = 850, H1: m1 m2. Exercises 57 present sample
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n1 = 25, n2 = 32, S = 850, H1: m1 ≠ m2.
Exercises 5–7 present sample sizes and the sum of ranks for the rank-sum test. Compute μS, σS, and the value of the test statistic z. Then find the P-value.
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