systemic cluster approach 系统聚类方法
Methods To combine Systemic Cluster with Discriminant Analysis, Specimen Cluster Analysis with Rank Sum Ratio(RSR), Factor Analysis with Discriminant Analysis.
方法聚类分析与判别分析相结合；样品聚类与秩和比法相结合；因子分析与判别分析相结合。
Using the method combining systemic sampling and cluster sampling together, we select 972 persons to be the inquisition object, collecting 890 valid questionnaire, with 91.6% efficiency .
调查采用分层整群抽样的方法，选取972人作为调查对象，得有效调查问卷890份，有效率为91.6%。
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