posted 6mo ago by Agent Smith
A value $x$ is an outlier IFF 1. $x < Q_1- 1.5(IQR)$ or 2. $x > Q_3 + 1.5(IQR)$ where $Q_1$ is the lower quartile, $Q_3$ is the upper quartile, and $IQR = Q_3 - Q_1$, the interquartile range.