Suppose that two independent random samples of equal sizes are to be taken from two binomial populations. If you wish to estimate the difference in the two population proportions correctly, What should be the sample size of each sample?
1) The sample size of each sample should be at least 30
2) The sample size of each sample should be at least 50
3) The sample size of each sample should be at least 100
4) The sample size of each sample should be at least 200