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Here are summary statistics for randomly selected weights of newborn girls: n = 36, x = 3216.7 g, s = 688.5 g. Use a confidence level of 99% to complete parts (a) through (d) below. a. Identify the critical value to / 2 used for finding the margin of error. ta /2= (Round to two decimal places as needed.) b. Find the margin of error. E = g Co (Round to one decimal place as needed.) c. Find the confidence interval estimate of u. P 9