This question: 1 point(s) possible Here are summary statistics for randomly selected weights of newborn girls: n = 36, x = 3180.6 g, s = 700.5 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 (Round to one decimal place as needed.) c. Find the confidence interval estimate of u.