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. Post should include a detailed solution and explanation 16. A 95% confidence interval for the MEAN recovery time after a certain major surgery is

. Post should include a detailed solution and explanation

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16. A 95% confidence interval for the MEAN recovery time after a certain major surgery is (60, 80) days. a) Find the sample mean used to form the interval. b) Find the margin of error. c) Assume that the population standard devi- ation is 40. Determine the sample size need- ed to create the confidence interval (60, 80) with the margin of error you found in part b

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