By the 1.5·IQR rule, an outlier is any value

Below Q1 − 1.5·IQR or above Q3 + 1.5·IQR Standard outlier fences: Q1 − 1.5·IQR and Q3 + 1.5·IQR.

Below mean − 2 SD or above mean + 2 SD

Below Q1 − 1.5·IQR or above Q3 + 1.5·IQR

Summary Statistics for a Quantitative Variable

AP Statistics· difficulty 4/5

By the 1.5\cdotIQR rule, an outlier is any value

Explanation

Standard outlier fences: Q1 - 1.5\cdotIQR and Q3 + 1.5\cdotIQR.

Want 10 more like this — adaptive to your weak spots?