A data display that shows
the five-number summary.
The whiskers, stretching outward from the first
quartile and third
quartile as shown below, are no longer than 1.5 times the interquartile
range (IQR). Outliers beyond
that are marked separately.
Note: Beginners are sometimes taught to
draw box-and-whisker plots,
which do not show outliers. Modified boxplot is a name sometimes
used for boxplots to distinguish them from box-and-whisker plots.