Question

A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug. 28 subjects had a mean wake time of 93.9 min and a standard deviation of 40.9 min. Assume that the 28 sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments. Does the result indicate whether the treatment is effective? Find the confidence interval estimate min<<min (Round to two decimal places as needed) Does the result indicate whether the treatment is effective? O A. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 93.9 minutes. OB. Yes, the confidence interval indicates that the treatment is effective because the interval contains minutes. OC. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 3.0 minutes OD. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain minutes O E. No, the confidence interval does not indicate whether the treatment is effective OF Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 0 minutes OG. Yes, the confidence interval indicates that the treatment is not effective because the interval contains 0 minutes.

Answer 1

In this M-28 ; S= 40.9 901. Conficience Interval 을 이와, 오구 0.05.27 二 40.133 Cdit-confesso or 2010 2, 구 010 2 2 X - X 늘어 -0.0 로 = 16.1514 오 095,2ㅋ Cms < a < 예외서 (n12 늘서 (28-1) Co.) (28)(40.9 40 1133 16.15 33.56 | 2 0 < < 152.88 No, the confidence interval does not indicate whether the treatment is effective option