4. (This problem is required to submit) Consider the following hypothesis test. H:µ = 20 H.:µ + 20 A sample of 200 items will be taken and the population standard deviation is o = 10. Use a = 0.05. Compute the probability of making a Type II error if the population mean is: a. u =18.0 (33%) (Note: without calculation process, no credit) b. µ= 22.5(33%) (Note: without calculation process, no credit) c. µ=21.0 (34%) (Note: without calculation process, no credit)

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