Finding Confidence Intervals. In Exercises 9-16, assume that each sample is a simple random sample obtained from a population with a normal distribution.

1. Body Temperature Data Set 5 "Body Temperatures" in Appendix B includes a sample of
   106 body temperatures having a mean of 98.20°F and a standard deviation of 0.62°F (for day 2 at 12 AM). Construct a 95% confidence interval estimate of the standard deviation of the body temperatures for the entire population.