Answer Happy

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 21 subjects had a mean wake time of 102.0 min. After treatment, the 21 subjects had a mean wake time of 93.6 min and a standard deviation of 21.8 min. Assume that the 21 sample values appear to be from a normally distributed population and construct a 99% 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 102.0 min before the treatment? Does the drug appear to be effective? Construct the 99% confidence interval estimate of the mean wake time for a population with the treatment min<<min (Round to one decimal place as needed.)

A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed below are the amounts of mercury (ppm) found in tuna sushi sampled at different stores in a major city. Construct a 99% confidence interval estimate of the mean amount of mercury in the population Does it appear that there is too much mercury in tuna sushi? 0.61 0.83 0.09 0.92 1.37 0.52 0.89 What is the confidence interval estimate of the population mean p? ppm<<ppm (Round to three decimal places as needed.)