Here are summary statistics for randomly selected weights of newborn girls: n = 196, x = 26 hg, s = 7.1 hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval 24.7 hg < u < 28.3 hg with only 18 sample values, x = 26.5 hg, and s = 2.9 hg? What is the confidence interval for the population mean ? nothing hg nothing hg (Round to one decimal place as needed.)