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A random sample of 54 of my statistics students resulted in a mean height of 66.4 inches. You may assume the population standard deviation is

A random sample of 54 of my statistics students resulted in a mean height of 66.4 inches. You may assume the population standard deviation is 3.8 inches. What sample size would be required to estimate the mean height for all my statistics students to within 1 inch with 95% confidence

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