A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the​ drug,  12 subjects had a mean wake time of  96.1 min and a standard deviation of 40.1 min. Assume that the 12 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.                                                                                                                                                                                                                     FInd the confidence interval estimate:  ______min<0<_____min (round to 2 decimal places as needed)

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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,  12 subjects had a mean wake time of  96.1 min and a standard deviation of 40.1 min. Assume that the 12 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.                                                                                                                                                                                                                     FInd the confidence interval estimate:  ______min<0<_____min (round to 2 decimal places as needed)

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