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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 97 2 min and a standard deviation of 42 3 min Assume that the 14 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 CO min o min Round to two decimal places as needed Does the result indicate whether the treatment is effective OA Yes the confidence interval indicates that the treatment is not effective because the interval does not contain 97 2 minutes OB Yes the confidence interval indicates that the treatment is not effective because the interval contains 0 minutes OC No the confidence interval does not indicate whether the treatment is effective OD Yes the confidence interval indicates that the treatment is not effective because the interval does not contain 0 minutes OE 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 effective because the interval contains 0 minutes OG Yes the confidence interval indicates that the treatment is effective bonnung

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