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Here are summary statistics for randomly selected weights of newborn girls: n = 248, x = 31.4 hg, s = 7.2 hg. Construct a confidence

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Here are summary statistics for randomly selected weights of newborn girls: n = 248, x = 31.4 hg, s = 7.2 hg. Construct a confidence interval estimate of the mean. Use a 90% confidence level. Are these results very different from the confidence interval 29.9 hg

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