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关于分层法的表述,错误的是(  )。

单选题
2021-07-17 20:39
A、分层的目的就是把性质相同的数据归纳在一起
B、常用分层标志有操作者、设备、原材料、缺陷项目等
C、分层法的关键是尽量使同一层内的数据波动大一些,各层间的数据波动小一些
D、分层法把收集到的原始质量数据按照一定的目的加以分类整理,据此进行质量分析
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正确答案
C

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