From a population made up of 3 strata of 1650, 630 and 920 units, a stratified sample is taken of size n = 50. The following results are obtained: Strata i 1 2 3 ni 25 10 15 oi 2 25 206 Previous studies had shown that Of = 3, 02 = 27 and 03 = 208. Estimate what would have been the margin of error of the population average (at the same significance level of = 5% ) if the optimal allocation of size n = 200 had been used. Choose between the options: A B C D E F G H 8.433 7.433 6.433 5.433 4.433 3.433 2.433 1.433