Here are summary statistics for randomly selected weights of newborn girls: n = 239, x = 32.9 hg, s =6.5 hg. Construct a confidence interval estimate of the mean. Use a 989 confidence level. Are these results very different from the confidence interval 31.6 hg < u < 34.6 hg with only 16 sample values, x = 33.1 hg, and s = 2.3 hg? . . . What is the confidence interval for the population mean ? ng