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 Skip Navigation LinksMath Help > Basic Math > Word Problems and Basic Arithmetic > Box and whisker plot


created by: Jennifer Nord,

A box-and-whisker plot can be useful for handling many data values. They allow people to explore data and to draw informal conclusions when two or more variables are present. It shows only certain statistics rather than all the data. Five-number summary is another name for the visual representations of the box-and-whisker plot. The five-number summary consists of the median, the quartiles, and the smallest and greatest values in the distribution. Immediate visuals of a box-and-whisker plot are the center, the spread, and the overall range of distribution.

The first step in constructing a box-and-whisker plot is to first find the median, the lower quartile and the upper quartile of a given set of data. Example: The following set of numbers are the amount of marbles fifteen different boys own (they are arranged from least to greatest).

18 27 34 52 54 59 61 68 78 82 85 87 91 93 100

35 is the interquartile range

Now we begin to draw our graph.

Here are some more web sites to visit:

Last update: December 10, 1995.

Internet references

Jennifer Nord's homepage: Jennifer Nord's little nitch in the woods

Jen's Line Plot Instructions

Jen's Stem-and-Leaf Plot Instructions

Kids Web Mathmatics

Math Magic!

Kids Web A World Wide Web Digital Library for Schoolkids

Kids Web Fun and Games

Web 66

Ellerbruch Home Page

Northern Michigan University

Related pages in this website

Set description notation - ways to describe a set


The webmaster and author of this Math Help site is Graeme McRae.