Here are summary statistics for the weights of Pepsi in randomly selected cans: n = 36, :74: 0.82411 lb, s = 0.0056? lb. Use a confidence level of 95% to complete parts (a) through (d) below. a. Identify the critical value tag used for nding the margin of error. th2 = 2.03 (Round to two decimal places as needed.) b. Find the margin of error. E=|:||b (Round to five decimal places as needed.) 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 AD. Construct a 90% confidence interval estimate of the mean skull width. 127.8 138.2 125.6 131.7 143.2 134.8 138.6 128.8 El mm