Supplementary Material - Graphic

The median is represented by a line subdividing the box, whose length represents the interquartile range (IQR). Lines are drawn to span data points within 1.5 IQR of the nearer quartile: one line extends to include all data points within 1.5 IQR of the upper quartile and stops at the largest such value, while the other extends to include all data within 1.5 IQR of the lower quartile and stops at the smallest such value.

Any data points beyond the lines (outliers) are shown individually.