Using the simple random sample of weights of women from a data​ set, we obtain these sample​ statistics: n=45 and x=143.49lb. Research from other sources suggests that the population of weights of women has a standard deviation given by σ=30.42lb.   a. Find the best point estimate of the mean weight of all women.   b. Find a 95​% confidence interval estimate of the mean weight of all women.

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Using the simple random sample of weights of women from a data​ set, we obtain these sample​ statistics: n=45 and x=143.49lb. Research from other sources suggests that the population of weights of women has a standard deviation given by
σ=30.42lb.
 
a. Find the best point estimate of the mean weight of all women.
 
b. Find a 95​% confidence interval estimate of the mean weight of all women.

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