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Reference.org
Fraction of variance unexplained
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<p>In <a href="/facts/Statistics/DNPsKGYU">statistics</a>, the fraction of variance unexplained (FVU) in the context of a <a href="/facts/Regression_analysis/n6z5Tf7K">regression task</a> is the fraction of variance of the <a href="/facts/Regressand/dINfzIF2">regressand</a> (dependent variable) <i>Y</i> which cannot be explained, i.e., which is not correctly predicted, by the <a href="/facts/Explanatory_variable/dINfzIF2">explanatory variables</a> <i>X</i>. </p>