Use your result from Exercise 12.132 to show that a (1 )- level confidence interval for

Use your result from Exercise 12.132 to show that a (1 − α)-

level confidence interval for the difference between two population proportions that has a margin of error of at most E can be obtained by choosing n1 = n2 = 0.5

 zα/2 E

2 rounded up to the nearest whole number.