a clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
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 1000 min After treatment, the 21 subjects had a mean wake time of 77.2 min and a standard deviation of 23.4 min. Assume that the 21 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...
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 100.0 min. After treatment, the 21 subjects had a mean wake time of 77.2 min and a standard deviation of 23.4 min. Assume that the 21 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 22 subjects had a mean wake time of 103.0 min. After treatment, the 22 subjects had a mean wake time of 98.3 min and a standard deviation of 23.1 min. Assume that the 22 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 14 subjects had a mean wake time of 104.0 min. After treatment, the 14 subjects had a mean wake time of 83.9 min and a standard deviation of 22.7 min. Assume that the 14 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 24 subjects had a mean wake time of 103.0 min. After treatment, the 24 subjects had a mean wake time of 79.2 min and a standard deviation of 20.2 min. Assume that the 24 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 24 subjects had a mean wake time of 101.0 min. After treatment, the 24 subjects had a mean wake time of 77.1 min and a standard deviation of 23.9 min. Assume that the 24 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 22 subjects had a mean wake time of 103.0 min. After treatment, the 22 subjects had a mean wake time of 77.2 min and a standard deviation of 22.6 min. Assume that the 22 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 25 subjects had a mean wake time of 103.0 min. After treatment, the 25 subjects had a mean wake time of 82.9 min and a standard deviation of 20.3 min. Assume that the 25 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 24 subjects had a mean wake time of 1010 min. After treatment, the 24 subjects had a mean wake time of 77.1 min and a standard deviation of 23.9 min. Assume that the 24 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...
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 24 subjects had a mean wake time of 104.0 min. After treatment, the 24 subjects had a mean wake time of 80.3 min and a standard deviation of 23.6 min. Assume that the 24 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...