分层取样
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.
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。
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