question 19

Question 19 of 25 Inis test: 25 point(S) possible This question: 1 point(S) possible Submit test A dinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment 23 subjects had a mean wake time of 101:0 min. After treatment, the 23 subjects had a mean wake time of 94 7 min and a standard deviation of 24.7 min. Assume that the 23 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 101.0 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 min