A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 17 subjects had a mean wake time of 100.0 min. Alter treatment, the 17 subjects had a mean wake time of 78.3 min and a standard deviation of 20.4 min. Assume that the 17 sample values appear to be from a normally distributed population and construct a 95% 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 95% cofidence interval estimate of the mean wake time for a population with the treatment. min

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Permutations and Combinations

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The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.