Express the confidence interval ( 76.1 % , 90.5 % ) in the form of ˆ p ± M E .

Answer 1

point estimate = (76.1 + 90.5)/2 = 83.3

ME = distance from point estimate to limits of CI: 83.3 - 76.1 = 7.2 (same as 90.5 - 83.3)

83.3 +/- 7.2