A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment. 16 subjects had a mean wake time of 103.0 min. After treatment, the 16 subjects had a mean wake time of 94.2 min and a standard deviation of 21.9 min. Assume that the 16 sample values appear to be from a normally distributed population and construct a 99% 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 103.0 min before the treatment? Does the drug appear to be effective? CETTE Construct the 99% confidence interval estimate of the mean wake time for a population with the treatment. min