For the following data obtained from four independent samples use
For the following data obtained from four independent samples, use the 0.025 level in testing H0: π1 = π2 = π3 = π4 versus H1: At least one population proportion differs from the others.
n1 = 150, p1 = 0.30
n2 = 80, p2 = 0.20
n3 = 140, p3 = 0.25
n4 = 50, p4 = 0.26
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