Whisker extends tosmallest data point within1.5 interquartile ranges from first quartile

First quartile Second quartile Third quartile

Whisker extends tolargest data point within1.5 interquartile ranges from third quartile

IIQR1.5 IIQR 1.5 IIQR 1.5 IIQR 1.5 IIQR

Outliers Outliers Extreme outlier

MONTGOMERY: Applied Statistics, 3eFig. 6.13 W-116