試題詳解

22. A manager wants to see whether the proportion of acceptable products from supplier A, PA iS greater than for supplier B, p8. The manager draw nA = 123 random sample from A's and nB = 94 samples from B's products. She finds that aeceptable rates of samples for products from A and B are = 0.79, respectively. The manager plans to compute a test statistic and compare it with critical value from a standard normal distribution with significance level 5%:
(A) The value of the test statistic is 1.575 and the critical value is 1.645.
(B) The value of the test statistic is 3.061 and the critical value is 2.33.
(C) The value of the test statistic is 0.984 and the critical value is 1.96.
(D) The value of the test statistic is 3:33 and the critical value is 2.33.
(E)The value of the test statistic is 1.775 and the critical value is 1.645.