A clinical trial was conducted to test the effectiveness of a drug treating insomnia in older subjects. Before treatment 24 subjects had a mean wake time of 100.00 min. After treatment the 24 subjects had a mean wake time of 96.9 minutes and a standard deviation of 23.3 minutes. Assume that the 24 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 do the results suggest about the mean wake time of 100.00 minutes? Does the drug appear to be effective