Using the simple random sample of weights of women from a data set, we obtain these sample statistics: nequals45 and x overbarequals149.27 lb. research from other sources suggests that the population of weights of women has a standard deviation given by sigmaequals30.72 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