Independent random samples of n1 = n2 = n observations are to be selected from each of two binomial populations 1 and 2. If you wish to estimate the difference in the two population proportions correct to within .05, with probability equal to .98, how large should n be? Assume that you have no prior information on the values of p1 and p2, but you want to make certain that you have an adequate number of observations in the samples.