Ononot — A population of N=1000 consists of two strata: N1=600 and N2

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A population of $N=1000$ consists of two strata: $N_1=600$ and $N_2=400$ . We want to estimate the total using a sample $n=100$ . If stratum standard deviations are $S_1=2$ and $S_2=8$ , what is the allocation $n_1$ under Neyman allocation?