Archeologists have studied sizes of Egyptian skulls in an attempt to determine whether breeding occurred between different cultures. Listed below are the widths (mm) of skulls from 150 A.D. Construct a 99% confidence interval estimate of the mean skull width. 128.1 138.4 125.8 131.6 143.2 135.1 138.8 129.3 Omm Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 99% confidence level. What does the confidence interval tell about the population of all college students in the state? 3.7, 3.0, 4.0, 4.5, 2.9, 4.2, 3.3, 4.9, 4.0, 4.4, 4.4, 3.8, 3.2, 3.9, 4.0 What is the confidence interval for the population mean ? 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? 0.58 0.71 0.11 0.89 1.31 0.52 0.82 What is the confidence interval estimate of the population mean? ppm