Question

see sco A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 17 subjects had a mean wake time of 93.8 min and a standard deviation of 41.5 min. Assume that the 17 sample values appear to be from a normally distributed population and construct a 98% 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<os 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 contains 0 minutes. O B. Yes, the confidence interval indicates that the treatment is effective because the interval contains 0 minutes. O C. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 93.8 minutes. O D. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 0 minutes O E. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 0 minutes. O F Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 93.8 minutes. Click to select your answer(s).

Answer 1

Answer:- Given that = 93.8 S: 41.5 n=17 2=0.02 98% confidence interval estimate of the standard deviation is h- n-1 coss VXm-1/2 V ^-1, 1-2/2 | 17-1 41.5 002 X 17-1,0.0% zos 41:57 17-1 27-11-09 us crom sosuissa 41.5 16 ✓ 30.57 -sos41.5 16 ✓ 5123 30.02 50572:59