HW 6.4 Save Score: 0 of 1 pt 8 of 8 (7 complete) HW Score: 71.88%, 5.75 of 8 pts 6.4.23-T Question Help The waiting times (in minutes) of a random sample of 20 people at a bank have a sample standard deviation of 3.6 minutes. Construct a confidence interval for the population variance of and the population standard deviation o. Use a 95% 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.)