Here are summary statistics for randomly selected weights of newborn girls: n = 209, × = 30.9 hg, s = 6.6 hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval 30.3 hg < u < 32.7 hg with only 19 sample values, x = 31.5 hg, and s = 2.1 hg?
