Question 2 20 pts Which of the following is the correct "normal" condition that must be met to calculate a confidence interval for the difference between two proportions? Onp _ 10 and n (1 - p) 2 10 Onp 2 10 and n (1 - p) 2 10 Omp _ 10. nap2 _ 10. n (1 - pi) _ 10, and n2 (1 - p2 ) = 10 On1 2 30 and 72 - 30