Are Parents of Girls More Inclined to Buy Them a Car

Multiple Choice

Are parents of girls more inclined to buy them a car when they leave for college than parents of boys? Simple random samples of 40 girls and 45 boys are taken from a large university on the West Coast.When interviewed,20 girls and 21 boys in the sample responded that their parents bought them a car.What is a 95% plus four confidence interval for the difference in population proportions of girls and boys whose parents bought a car for them when they left for college? Use girls as Group 1 and boys as Group 2.

A) (-0.143,0.206)
B) (-0.176,0.240)
C) (-0.179,0.246)
D) (-0.241,0.305)