A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 14 subjects had a mean wake time of 90.3 min and a standard deviation of 43.9 min. Assume that the 14 sample values appear to be from a normally distributed population and construct a 95% 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?
A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 14 subjects had a mean wake time of 90.3 min and a standard deviation of 43.9 min. Assume that the 14 sample values appear to be from a normally distributed population and construct a 95% 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?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 14 subjects had a mean wake time of 90.3 min and a standard deviation of 43.9 min. Assume that the 14 sample values appear to be from a
Transcribed Image Text:35. A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 14 subjects had a mean wake time of
90.3 min and a standard deviation of 43.9 min. Assume that the 14 sample values appear to be from a normally distributed population and construct a 95% 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<
(Round to two decimal places as needed.)
Does the result indicate whether the treatment is effective?
min
O A. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 0 minutes.
O B.
No, the confidence interval does not indicate whether the treatment is effective.
O C.
Yes, the confidence interval indicates that the treatment is effective because the interval contains 0 minutes.
O D. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 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 not effective because the interval does not contain 90.3 minutes.
O G. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 90.3 minutes.
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