# Confidence Intervals for ?? and ?? 2 a. Use the sample data from Exercise 9 to construct a 95%…

Confidence Intervals for ?? and ??2a. Use the sample data from Exercise 9 to construct a 95% confidence interval estimate of the population standard deviation.b. Use the sample data from Exercise 9 to construct a 95% confidence interval estimate of the population variance.Execise 9Discarded Glass Listed below are weights (in pounds) of glass discarded in one week by randomly selected households (based on data from the Garbage Project at the University of Arizona).a. What is the best point estimate of the mean weight of glass discarded by households in a week?b. Construct a 95% confidence interval estimate of the mean weight of glass discarded by all households.c. Repeat part (b) assuming that the population is normally distributed with a standard deviation known to be 3.108 lb.3.52 8.87 3.99 3.61 2.33 3.21 0.25 4.94