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Reference.org
Youden's J statistic
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<p>Youden's J statistic (also called Youden's index) is a single statistic that captures the performance of a <a href="/facts/Dichotomy/mDufyfsP">dichotomous</a> diagnostic test. In <a href="/facts/Meteorology/xblFr28q">meteorology</a>, this statistic is referred to as Peirce Skill Score (PSS), Hanssen–Kuipers Discriminant (HKD), or True Skill Statistic (TSS). </p><p>(Bookmaker) Informedness is its generalization to the multiclass case and estimates the probability of an <a href="/facts/Decision-making/NbJYprSw">informed decision</a>. </p>