Here are summary statistics for randomly selected weights of newborn​ girls: n=209​, x=27.9 ​hg, s=6.5 hg. Construct a confidence interval estimate of the mean. Use a 98​% confidence level. Are these results very different from the confidence interval 26.5 hg<μ<28.9 hg with only 19 sample​ values, x=27.7 ​hg, and s=2.1 ​hg?

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