=+14. Of the elements of a certain population 20% are grouped into stratum S1 and the rest of the population elements comprise stratum S2. Suppose that the variances of the characteristic being measured are the same for each stratum, but it costs twice as much to obtain a sampled item from stratum S1 as it does from stratum S2. What is the best allocation of a total sample of n 5 1000 to these two strata?