Design Population based, matched pair before and after analysis.
分析前和分析后均进行人群为基础的配对。
Objective:The matched-pair design is generalized to the situation with non-null hypothesis and stratification.
目的：将配对设计加以扩展，以适应非虚假设和分层。
Objective:The matched-pair design is generalized to the situation with non-null hypothesis and stratification.
目的：将配对设计加以扩展，以适应非虚假设和分层。
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