9-19. The proportion of adults living in Tempe, Arizona, who are college graduates is
Chapter 9, Problem 9-19(choose chapter or problem)
9-19. The proportion of adults living in Tempe, Arizona, who are college graduates is estimated to be p 0.4. To test this hypothesis, a random sample of 15 Tempe adults is selected. If the number of college graduates is between 4 and 8, the hypothesis will be accepted; otherwise, we will conclude that . (a) Find the type I error probability for this procedure, assuming that p 0.4. (b) Find the probability of committing a type II error if the true proportion is really p 0.2.
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