A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects . Before treatment , 17 subjects had a mean wake time of 105.0 minAfter treatment , the 17 subjects had a mean wake time of 84.7 min and a standard deviation of 24.8 min. Assume that the 17 sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the mean wake time for a population with drug treatments. What the result suggest about the mean wake time of 105.0 min before the treatment ? Does the drug appear to be effective? Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment (Round to one decimal place as needed .)