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Please help me understand the steps by hand, what to look for to know what to do on ti 83 and the steps

Here are summary statistics for randomly selected weights of newborn girls: n 237, x-27.5 hg, s 7.9 hg. Construct a confidence interval estimate of the mean. Use a 99% confidence level. Are these results very different from the confidence interval 24.1 hg <μ < 30.1 hg with only 14 sample values, X-27.1 hg, and s-3.7 hg? What is the confidence interval for the population mean μ? [ ] hg < μ < | | hg (Round to one decimal place as needed.)

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