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Here are summary statistics for randomly selected weights of newborn girls: n # 238, x = 31.1 hg, s = 6.4 hg. Construct a confidence

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Here are summary statistics for randomly selected weights of newborn girls: n # 238, x = 31.1 hg, s = 6.4 hg. Construct a confidence interval estimate of the mean. Use a 90%% confidence level. Are these results very different from the confidence interval 30.5 hg

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