A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects Before treatment, 20 subjects had a mean wake time of 104 0 mim After treatment, the 20 subjects had a mean wake time of 76 3 min and a standard deviation of 24.2 min. Assume that the 20 sample values appear to be from a normally distributed population and construct a confidence Interval estimate of the mean wake time for a population With drug treatments. What does the result suggest about the mean wake time of 104 0 min before the treatment? Does the drug appear to be effective? Construct the confidence interval estimate of the mean wake time for a population With the treatment. (Round to one decimal place as needed.)