Question

A dinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before reatment, 16 subjects had a mean wake time of 103.0 min. After treatment, the 16 subjects had a mean wake time of 98.2 min and a standard deviation of 24.6 min. Assume that the 16 sample values appear to be from a normall 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 103.0 min before the treatment? Does the drug appear to be effective? Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment. minHemin Round to one decimal place as needed.)

Answer 1

from above 90% confidence interval of mean 87.4 <$\mu$ <109.0