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单词
two-stage sampling
释义
two-stage sampling
Encyclopedia
农学
抽样调查
释
two-stage sampling
二阶抽样
设总体由个初级单元组成,每个初级单元又由若干次级单元组成,在总体中按一定方法抽取若干初级单元,对每个被抽中的初级单元再抽取若干次级单元进行调查的方法。
Mathematics
two-stage sampling
二次抽样
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