Boxplot

In statistics, a boxplot is a graphic representation. It is also called a box-and-whisker diagram.

Typically, the boxplot enables the median, the quartiles and the centiles (5^th and 95^th) or the deciles (1^st and 9^th) to be represented. Anomalous data are also often represented (outliers).

It can be found in various forms in which the minimum and maximum of a sample are represented instead of centiles or deciles.

A set of data where the quartiles, deciles and median are represented. © Bruno Scala

The diagram above shows a set of data separated into quartiles and deciles. The median is also shown.

The boxplot corresponding to this set of data (below) highlights the median, the1^st and 3^rd quartiles and the 1^st and 9^th deciles.