A skewed distribution implies that assignable causes of variation may be present.

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A skewed distribution indicates that the data is not evenly distributed, which could be caused by the presence of assignable causes of variation. Assignable causes are factors that can be identified and eliminated to improve the quality of the output. Therefore, a skewed distribution can be a signal that there are assignable causes that need to be identified and addressed.

A Skewed Distribution Implies That Assignable Causes of Variation May