5.) 39 packages are randomly selected from packages received by a parcel service. The sample mean weight is 15.3 pounds and previous examples have given the population standard deviation as 1.9 pounds. Construct a 99% confidence interval for the true mean weight of all packages received by the parcel service.

-For questions 1,2,3 & 5 use the Z values. For question 4(body temperature for part A, use the "t" distributions and for part B use (Chi-square).