clinical trial was conducted to test the effectiveness of a drug used for treating insomnia older subjects. After treatment with the drug, 26 subjects had a mean wake time of 8.7 min and a standard deviation of 43.9 min. Assume that the 26 sample values appear Obe from a normally distributed population and construct a 90% confidence interval stimate of the standard deviation of the wake times for a population with the drug reatments. Does the result indicate whether the treatment is effective?
clinical trial was conducted to test the effectiveness of a drug used for treating insomnia older subjects. After treatment with the drug, 26 subjects had a mean wake time of 8.7 min and a standard deviation of 43.9 min. Assume that the 26 sample values appear Obe from a normally distributed population and construct a 90% confidence interval stimate of the standard deviation of the wake times for a population with the drug reatments. Does the result indicate whether the treatment is effective?
MATLAB: An Introduction with Applications
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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, 26 subjects had a mean wake time of
98.7 min and a standard deviation of 43.9 min. Assume that the 26 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?
A. Yes, the confidence interval indicates that the treatment is effective because the
interval does not contain 98.7 minutes.
OB. Yes, the confidence interval indicates that the treatment is effective because the
interval contains 0 minutes.
OC. Yes, the confidence interval indicates that the treatment is not effective because
the interval does not contain 98.7 minutes.
OD. 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.
OF. Yes, the confidence interval indicates that the treatment is not effective because
the interval contains 0 minutes.
O G. No, the confidence interval does not indicate whether the treatment is effective.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F41a11f92-ec66-4681-9866-6ecb7ea598eb%2Fc3f63856-a805-440a-8827-a902904b8248%2F45szv6p_processed.jpeg&w=3840&q=75)
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, 26 subjects had a mean wake time of
98.7 min and a standard deviation of 43.9 min. Assume that the 26 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?
A. Yes, the confidence interval indicates that the treatment is effective because the
interval does not contain 98.7 minutes.
OB. Yes, the confidence interval indicates that the treatment is effective because the
interval contains 0 minutes.
OC. Yes, the confidence interval indicates that the treatment is not effective because
the interval does not contain 98.7 minutes.
OD. 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.
OF. Yes, the confidence interval indicates that the treatment is not effective because
the interval contains 0 minutes.
O G. No, the confidence interval does not indicate whether the treatment is effective.
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