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{{Short description|Statistical noise}}{{Unreferenced|date=February 2007}}
{{broader|Explained variation}}
In [[statistics]], the '''fraction of variance unexplained''' ('''FVU''') in the context of a [[Regression analysis|regression task]] is the fraction of variance of the [[regressand]] (dependent variable) ''Y'' which cannot be explained, i.e., which is not correctly predicted, by the [[explanatory variable]]s ''X''.
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