A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 18 subjects had a mean wake time of 100.0 min. After treatment, the 18...


A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 18 subjects had a mean wake time of 100.0 min. After<br>treatment, the 18 subjects had a mean wake time of 96.5 min and a standard deviation of 20.9 min. Assume that the 18 sample values appear to be from a normally distributed<br>population and construct a 90% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake<br>time of 100.0 min before the treatment? Does the drug appear to be effective?<br>Construct the 90% confidence interval estimate of the mean wake time fora population with the treatment.<br>min <u< min<br>(Round to one decimal place as needed.)<br>What does the result suggest about the mean wake time of 100.0 min before the treatment? Does the drug appear to be effective?<br>The confidence interval<br>V the mean wake time of 100.0 min before the treatment, so the means before and after the treatment<br>V This result<br>suggests that the drug treatment<br>a significant effect.<br>

Extracted text: A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 18 subjects had a mean wake time of 100.0 min. After treatment, the 18 subjects had a mean wake time of 96.5 min and a standard deviation of 20.9 min. Assume that the 18 sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 100.0 min before the treatment? Does the drug appear to be effective? Construct the 90% confidence interval estimate of the mean wake time fora population with the treatment. min
Jun 03, 2022
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