本文结合案例提出了一些避免分组陷阱的手段，还提供了理解辛普森悖论的一个角度。
Some techniques to avoid grouping errors are provided in this paper, and a perspective to understand Simpson Paradox discussed.
本文结合案例提出了一些避免分组陷阱的手段，还提供了理解辛普森悖论的一个角度。
Some techniques to avoid grouping errors are provided in this paper, and a perspective to understand Simpson Paradox discussed.
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