A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment,13 subjects had a mean wake time of 105.0 min. After treatment, the 13 subjects had a mean wake time of 100.3 min and a standard deviation of 22.3 min. Assume that the 13 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. a) Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment ___min < μ < ___mi (Round to 1 decimal place es needed) b) What does the result suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective?
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment,13 subjects had a mean wake time of 105.0 min. After treatment, the 13 subjects had a mean wake time of 100.3 min and a standard deviation of 22.3 min. Assume that the 13 sample values appear to be from a
a) Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment
___min < μ < ___mi
(Round to 1 decimal place es needed)
b) What does the result suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective?
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