stratification sampling的例句大全

Based on the data obtained by stratification sampling questionnaire sheets sent to students of Huazhong Agricultural University, a study was made of the environment quality evaluation factors of this university campus.

在分层抽样问卷调查的基础上，运用方差分析、因子分析及模糊综合评判等方法对华中农业大学校园环境质量主观评价因子进行了具体分析。

The research adopted the cluster stratification sampling and used household survey among 4 980 adolescents aged from 10 to 24 in these four cities.

采用整群分层抽样和入户调查方法，对4市4980名10～24岁青少年进行研究。

Methods The multi-stage sampling method, i.e. cluster and stratification sampling combined with systematic sampling, was applied to conduct a household survey of residents in communities. The data of survey were recorded with database of Epi data, and analyzed statistically with analysis software of SAS.

方法采取多阶段抽样方法，即整群分层抽样和机械抽样相结合的方法对社区居民进行入户调查，调查数据采用EPI DATA数据库录入，SAS分析软件进行统计分析。

The generalization of post stratification from the simple random sampling to complex design is discussed.

此外,我们探讨复杂抽样下,该估计值的推广.