# n1 = 20, n2 = 30, S = 400, H1: m1 < m2. Exercises 57 present sample

## Question:

n1 = 20, n2 = 30, S = 400, 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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