THE BEST CHOICE OF SUBSAMPLE SIZE (m,k) IN 3 STAGE SAMPLING

3단계 표본 추출에 있어서 부차표본(m,k)의 최상 선택

In this paper we extend the best choice of subsample size m in the 2-stage sampling which suggested by Mohammad(1986) to the 3-stage sampling in cases of known and of unknown cost and variance ratio. We find the subsample size m.k which ensures more than the relative efficiency 90% Also we see that the choice of 3-stage subsample size depends on the design parameters using in 2-stage sampling.