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8.1 A Single Population Mean using the Normal Distribution 95. Among various ethnic groups, the standard deviation of heights is known to be approximately three

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8.1 A Single Population Mean using the Normal Distribution 95. Among various ethnic groups, the standard deviation of heights is known to be approximately three inches. We wish to construct a 95% confidence interval for the mean height of male Swedes. Forty-eight male Swedes are surveyed. The sample mean is 71 inches. The sample standard deviation is 2.8 inches. a. i. X = ii. o= iii. n =

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