MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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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, 24 subjects had a mean wake time of 98.4 min and a standard deviation of 43.6 min. Assume that the 24 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< 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 98.4 minutes. B. Yes, the confidence interval indicates that the treatment is not effective because the interval contains 0 minutes. C. No, the confidence interval does not indicate whether the treatment is effective. D. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 0 minutes. E. Yes, the confidence interval indicates that the treatment is effective because the interval contains 0 minutes. F. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 0 minutes. G. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 98.4 minutes.
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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, 24 subjects had a mean wake time of 98.4 min and a standard deviation of 43.6 min. Assume that the 24 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< 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 98.4 minutes. B. Yes, the confidence interval indicates that the treatment is not effective because the interval contains 0 minutes. C. No, the confidence interval does not indicate whether the treatment is effective. D. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 0 minutes. E. Yes, the confidence interval indicates that the treatment is effective because the interval contains 0 minutes. F. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 0 minutes. G. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 98.4 minutes.
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