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= Test: Test # 3 Question 18 This Test: 20 pts possible Submit Test Here are summary statistics for randomly selected weights of newborn girls: n = 36, x = 3222.2 g, s = 686.7 g. Use a confidence level of 95% 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 ur (Round to one decimal place as needed.) c. Find the confidence interval estimate of p. ns 9