Homework: Topic 4 HW Save Score: 0.33 of 1 pt 35 of 40 (40 complete) N Score: 84%, 33.6 of 40... 7.3.11-T Question Help A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 11 subjects had a mean wake time of 96.7 min and a standard deviation of 40.9 min. Assume that the 11 sample values appear to be from a normally distributed population and construct a 98% confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments. Does the result indicate whether the treatment is effective? Find the confidence interval estimate. min