#15

Math-K300 Spring 2022 Online Kierstyn Cochran 03/27/22 9:38 AM ? E Homework: Section 6.4 Confidence Intervals for Question 15, 6.4.23-T HW Score: 56.82%, 12.5 of 22 points Variance and Part 1 of 4 O Points: 0 of 1 Save The waiting times (in minutes) of a random sample of 21 people at a bank have a sample standard deviation of 4.5 minutes. Construct a confidence interval for the population variance of and the population standard deviation o. Use a 90% level of confidence. Assume the sample is from a normally distributed population. What is the confidence interval for the population variance o?? (Round to one decimal place as needed.)