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A medical statistician wants to estimate the average weight loss of people who are on a new diet plan. Suppose the population standard deviation is

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A medical statistician wants to estimate the average weight loss of people who are on a new diet plan. Suppose the population standard deviation is 13 pounds. How large a sample should the statistician take to estimate the mean weight loss to within 13 pounds with 95% confidence? 72 73 74 None of these options 75 71

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