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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. 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<

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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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, 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. '? C
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. '? C
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