Body mass index is measured as the ratio of weight in kg to height in meters squared. Assume that the mean BMI in patients free of diabetes was reported as 28.2. An investigator conducted a study to test the hyothesis that the BMI in patients free of diabetes is higher compared to patients with diabetes. In this study the mean and standard deviation was reported as 31.7 and 5.9. Determine the 99% confidence interval around the mean from the study. Dont need to know the sample size to solve?