The Six Sigma Black Belt should be able to identify which cause on a list of possible causes will most likely explain a non-random pattern in the regression residuals.

西格玛黑带应能识别在各种可能原因的列表中，哪一个原因最合适解释在回归残差中出现的非随机分布。

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Hence, any time we see anything remotely resembling a pattern, we assume there must be something non-random causing it.

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