This Test: 164 pts possible see A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 22 subjects had a mean wake time of 101.0 min. After treatment, the 22 subjects had a mean wake time of 72.5 min and a standard deviation of 20.5 min. Assume that the 22 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 see suggest about the mean wake time of 101,0 min before the treatment? Does the drug appear to be effective? Construct the 99% confidence interval estimate of the mean wake time for a population with the treatment. see s min