A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 27 subjects had a mean wake time of 90.6 min and a standard deviation of 41.6 min. Assume that the 27 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
A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 27 subjects had a mean wake time of 90.6 min and a standard deviation of 41.6 min. Assume that the 27 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
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 27 subjects had a mean wake time of 90.6 min and a standard deviation of
41.6 min. Assume that the 27 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 <o< 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 effective because the interval does not contain 90.6 minutes.
O B. Yes, the confidence interval indicates that the treatment is not effective because the interval contains 0 minutes.
O C. Yes, the confidence interval indicates that the treatment is effective because the interval contains 0 minutes.
D. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 0 minutes.
Е.
No, the confidence interval does not indicate whether the treatment is effective.
OF.
Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 0 minutes.
O G. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 90.6 minutes.
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