A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug. 11 subjects had a mean wake time of 97.5 min and a standard deviation of 40.5 min. Assume that the 11 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<
A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug. 11 subjects had a mean wake time of 97.5 min and a standard deviation of 40.5 min. Assume that the 11 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<
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, 11 subjects had a mean wake time of 97.5 min and a standard deviation of 40.5 min. Assume that the 11 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<< 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 0 minutes.
No, the confidence interval does not indicate whether the treatment is effective.
O B.
O C. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 97.5 minutes.
O D.
Yes, the confidence interval indicates that the treatment is effective because the interval contains 0 minutes
O E.
Yes, the confidence interval indicates that the treatment is not effective because the interval contains 0 minutes.
O F.
Yes, the confidence interval indicates that the treatment is 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 97.5 minutes.
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C
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