An official of a large national union claims that the fraction of women in the union is not significantly different from one-half. Using the critical value approach and the sample information reported below, carry out a test of this statement. Let ? = 0.05. sample size 400 women 168 men 232
H0: P = 0.5
Ha: P ? 0.5 Reject H0; test statistic Z = -3.2 < -1.96
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