A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. before treatment, 19 subjects had a mean wake time of 102.0 minutes. after treatment the 19 subjects had a mean wake time of 74.5 minutes and a standard deviation of 20.7 minutes. assume that the 19 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. Construct the 99% confidence interval estimate of the mean wake time for a population with the treatment