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Assume that the heights of of adult males in a certain region are normally distributed The heights in inches of 20 randomly selected adult males

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Assume that the heights of of adult males in a certain region are normally distributed The heights in inches of 20 randomly selected adult males from this region are listed below 70 72 71 70 69 73 69 68 70 71 67 71 70 74 69 68 71 71 71 72 Use this sample data and construct a 98 confidence interval for the population standard deviation

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