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Unformatted text preview: vote for the Progressive Party. Is there any substantial evidence to suggest that the party has increased its support? Hint: use the fact that x n p r pq n is distributed approximately as a standard normal variate. 3. Imagine that a random sample of size 160 is drawn from a normal popula-tion where the standard deviation is 25 in order to test the null hypothesis that the mean is 104 against the alternative that it is 100. Calculate the probability of a Type II error in a one-tailed test with a 5% signicance level. What sample size is required for the probability of the Type II error to be 0.05?...
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- Spring '12