A school-board administrator believes that the average number of days absent per year among students is less than 10 days. From past experience, he knows that the population standard deviation is 3 days. In testing to determine whether his belief is true, he could use one of the following plans:,i. n = 100, ? = .01,ii. n = 75, ? = .05,iii. n = 50, ? = .10,Which plan has the lowest probability of a Type II error, given that the true population average is 9 days?
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