A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment with the drug, 20 subjects had a mean wake time of 106.9 min. After treatment the 20 subjects had a mean wake time of 69.6 minutes and a standard deviation of 42 minutes. Assume that the samples are from normally distributed population and are randomly selected. At the 0.05 significance level test the claim that after treatment with the drug subjects have a mean wake time of less than 106.9 minutes. Does it appear that the drug is effective?
TYPE (including your name) the question on a separate page and the solution must fill an entire page. No hand drawn graphs, equations or symbols all must be computer generated and no liquid paste. Everything can be done in Word. Be sure to include the null and alternative, significance level, critical value(s), the test statistic with calculations shown, the properly drawn graph, decision criteria, decision and one of the four possible conclusions. Don't forget to answer the question at the end of the problem.
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment with the drug, 20 subjects had a
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