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3. (8 points) Consider the following data on the diameter of a rivet. Assume the diameter is normally distributed with a variance of oz. 6.68,

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3. (8 points) Consider the following data on the diameter of a rivet. Assume the diameter is normally distributed with a variance of oz. 6.68, 6.66, 6.62, 6.72, 6.76, 6.67, 6.70, 6.72, 6.78, 6.66 Please compute a 95 percent two-sided confidence interval for o2

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