Math Whizz

.5 ± .103

.5 } .103, because, as the math guru said the formula is (p1 - p2) } 2.58 ã(p1(1-p1)/n1 + p2(1-p2)/n2), the 2.58 comes from the z-score table. The question doesn't want you to solve the whole formula, just the first and last.. (175/250)-(43/215)=.5 and...