8) x1 = 27, n1 = 67 and x2 = 27, n2 = 72; Construct a 95% confidence interval for the difference between population proportions p1 - p2.
A) -0.134 < p1 - p2 < 0.190        B) -0.165 < p1 - p2 < 0.596
C) 0.210 < p1 - p2 < 0.596         D) 0.241 < p1 - p2 < 0.565