Question 10

A clinical trial was conducted to test the effectiveness of a dryg for . treating insomnia in older subjects. Before treatment, 14 syb;ects had a . mean wake time of 104.0 min. After treatment, the 14 subjects had a . mean wake time of 81.6 min and a standard deviation of 20.3 min. Assume that the 14 sample values appear to be from a normally distributed population and construct a 95% 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 104.0 min before the treatment? Does the drug appear to be effective? - Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment