(Solved): Here are summary statistics for randomly selected woights of newborn girls. n=164,x=30.7hg,s=6.4 ...

Here are summary statistics for randomly selected woights of newborn girls. $n=164,\stackrel{?}{x}=30.7\mathrm{hg},s=6.4$ hg. Construct a confidence interval estimate of the mean. Use a $98\%$ confidence level. Are these results vory difforent from the confidence interval $29.5\mathrm{hg}<?<32.3\mathrm{hg}$ with only 17 sample values, $x=30.9\mathrm{hg}$, and $5=23\mathrm{hg}$ ? What is the confidence interval for the population mean $?$ ? $hg<?<hg$ (Round to one decimat place as needed.)