Elementary Statistics page 385. # 16 Insomnia Treatment: A clinical trial was conducted to test the effectiveness of the drug zopiclone for treating insomnia in older subjects. Before treatment with zopiclone, 16 subjects had a mean wake time of 102.8 min. After treatment with zoplicone, the 16 subjects had a mean wake time of 98.9 min. and a standard deviationof 42.3 min (based on data from "Cognitive Behavioral Therapy vs. zopiclone for treatment of Chronic Primary Insomnia in older Adults, " by Siversten et al., Journal of the American Medical Association, Vol 295, No. 24). Assume that the 16 sample values appear to be from a normally distributed population and construct a 98% confidence interval estimate of the mean wake time for a population with zopiclone treatments. What does the result suggest about the mean wake time of 102.8 min before the treatment? Does zopliclone appear to be effective?