Answer Happy

3. Statistics at a certain college has been historically taught at two times: at 8 am and at 4 pm. A random sample of 150 students that took the moming class results in a mean score of 81.2 points, with a standard deviation of 18 points, and a random sample of 150 students that took the afternoon class results in a mean score of 76.4 points and a standard deviation of 21 points. For this problem, assume that the sample sizes are large enough so that the sample standard deviations (S) are good approximations for the unknown population standard deviations (6) a. Compute a 95% confidence interval for the mean score for all students taking statistics at 8 am. b. Compute a 95% confidence interval for the mean score for all students taking statistics at 4 pm. e. Based on the confidence intervals, is there strong evidence to support the claim that the morning classes do better in statistics? Explain.