Question

1 UI 23 ('16 Compete) This les 23 pas possible A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 18 subjects had a mean wake time of 104.0 min After treatment, the 18 subjects had a mean wake time of 82.4 min and a standard deviation of 21.3 min. Assume that the 18 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 5 min < < 6 min (Round to one decimal place as needed) What does the result suggest about the mean wake time of 104.0 min before the treatment? Does the drug appear to be effective? The confidence interval does not include the mean wake time of 1040 min before the treatment, so the means before and after the treatment are different This result suggests that the drug treatment has a significant effect. Enter your answer in each of the answer boxes Activity Details Otae wa

Answer 1

given, D=18, x=82-4, S=21:3 _95% confidence interval C-I = x++* (5) - 82.6+ 2.110 / 2103 Vio = 82:4 10.5934 =(71.8066, 92.9934) C.Id +7 108 <i<93.0 che confidence interval és 7/18 min sel 5.93.0_mipi The contidence interval does not include the mean wake time of 104.0min. before I the the treatment, so the means before and Latter the treatment are different This result suggests that the drug treatment has a significand tes