As is known to all, variance analysis is a common used statistical method.

众所周知，方差分析法是一种常用的统计方法。

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Just as Jack · Welch said, "Six Sigma is just a method of variance".

正如杰克·韦尔奇所说的：“六西格玛就是个方差的问题”。

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Just as Jack · Welch said, "Six Sigma is just a method of variance".

正如杰克·韦尔奇所说的：“六西格玛就是个方差的问题”。

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