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1)  stratified three-stage sampling
分层三阶段抽样
2)  Stratified three-stage PPS random sampling
分层三阶段PPS随机抽样
3)  stratified multi-stage sampling
分层多阶段抽样
4)  three-stage sampling
三阶段抽样
1.
A balanced three-layer sample rotation pattern is presented in this paper to solve the problem of rotation for the quarterly surveys with three-stage sampling designs.
本文构造了一种平衡的三层次样本轮换模式,解决了三阶段抽样季度调查的三层次样本轮换问题。
2.
Another balanced three-layer sample rotation pattern based on the former one given by the author is presented to solve the problem of rotation for quarterly surveys with three-stage sampling designs;and the new one has the same characteristics of keeping the sample match rates constant when any rotation is conducted as the former one.
针对采用三阶段抽样设计的季度调查,在此之前构造的一种平衡三层次样本轮换模式的基础上,构造了另外一种平衡的三层次样本轮换模式。
5)  stratified three-stage systematic random sumpling
分层三阶等距随机抽样
6)  three-stage clustered randomized sampling
三阶段随机抽样
补充资料:分层抽样
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性质:又称分类抽样或类型抽样。将总体划分为若干个同质层,再在各层内随机抽样或机械抽样,分层抽样的特点是将科学分组法与抽样法结合在一起,分组减小了各抽样层变异性的影响,抽样保证了所抽取的样本具有足够的代表性。分层抽样根据在同质层内抽样方式不同,又可分为一般分层抽样和分层比例抽样,一般分层抽样是根据样品变异性大小来确定各层的样本容量,变异性大的层多抽样,变异性小的层少抽样,在事先并不知道样品变异性大小的情况下,通常多采用分层比例抽样。

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