question archive Using the simple random sample of weights of women from a data? set, we obtain these sample? statistics: n=45 and x=149

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we obtain these sample? statistics: n=45 and x=149.26 lb. Research from other sources suggests that the population of weights of women has a standard deviation given by σ=31.07 lb.

a. Find the best point estimate of the mean weight of all women.

b. Find a 99?% confidence interval estimate of the mean weight of all women.