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 99% to complete parts (a) through (d) below.

a. Identify the critical value ta/2 used for finding the margin of error.

ta/2 = 2.72

(Round to two decimal places as needed.)

b. Find the margin of error.

E =