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1)  cluster sampling
群集抽样
2)  Cluster sampling
整群抽样
1.
Methods Cluster sampling method was used and the results were analyzed for cultivable bacteria in several representative hospitals of Chengde city from May 1998 to May 2000.
方法采取整群抽样方法,对承德市几家有代表性医院从1998年5月至2002年5月的临床细菌培养结果进行统计分析。
2.
Methods 3299 students in Tongcheng middle and elementary schools were sampled by cluster sampling and some common diseases were investigated.
方法 通过整群抽样对桐城市 32 99名中小学生进行健康检查和常见病的监测。
3.
For stratified and cluster sampling with inappreciable differences, estimate precision becomes poor.
对于分层抽样和整群抽样,当群体间的差异、群内个体间差异均不显著时,其估计精度往往都很差。
3)  cluster sampling
分群抽样
4)  group sampling
集团抽样
1.
In the research of group sampling, and give the estimate of mean with its character in the common method of group sampling, but they do not pay attention to the effect of each group in the general stage to estimate result.
在集团抽样调查中,[1]和[2]给出了一般抽样方法及均值估计和它性质的论述,但未考虑各集团在总体中的地位对估计结果的影响。
5)  group sampling
集体抽样
6)  cluster sampling
类集抽样
补充资料:整群抽样
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性质:将总体中各单位划分为若干群,从各群中随机抽取整群样品,例如,调查中学生患近视眼的情况,抽某一个班做统计;进行产品检验;每隔8h抽1h生产的全部产品进行检验等。整群抽样的优点是抽样方法简便,缺点是抽取的样本在总体中分布不均匀,代表性差。

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