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Here are summary statistics for randomly selected weights of newborngirls: n=243, x=31.8 hg, s=7.3 hg. Construct a confidence interval estimate of the mean. Use a

Here are summary statistics for randomly selected weights of newborngirls: n=243, x=31.8 hg, s=7.3 hg. Construct a confidence interval estimate of the mean. Use a 95% confidence level. Are these results very different from the confidence interval 29.5 hg<<33.5 hg with only 12 samplevalues, x=31.5 hg, and s=3.1 hg?

What is the confidence interval for the population mean ?

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