A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 13 subjects had a mean wake time of 105.0 min. After treatment, the 13 subjects had a mean wake time of 82.8 min and a standard deviation of 22.3 min. Assume that the 13 sample values appear to be from a norr tally distributed population and construct a 90% 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 105.0 min before the treatment? Does the drug appear to be effective? e. ,.,V v. .., . E) . ,m,. a\" Construct the 90% condence interval estimate of the mean wake time for a population with the treatment. Dmin