Here are summary statistics for randomly selected weights of newborn girls: n = 160, x = 30.7 hg, s = 6.6 hg. Construct a confidence interval estimate of the mean. Use a 99% confidence level. Are these results very different from the confidence interval 29.4 hg < u < 32.4 hg with only 17 sample values, x = 30.9 hg, and s = 2.1 hg?
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