Here are summary statistics for randomly selected weights of newborn​ girls: n equals 158​,x overbar equals 29.4 ​hg,s equals 7.9 hg. Construct a confidence interval estimate of the mean. Use a 90% confidence level. Are these results very different from the confidence interval 27.9 hg less than mu less than 31.7 hg with only 13 sample​ values, x over bar equals 29.8 ​hg, and s equals 3.8 ​hg? a. What is the confidence interval for the population mean mu​?   hg less than mu less than hg ​ (Round to one decimal place as​ needed.)

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