Creating a Box-and-Whisker Plot

Seventh Grade

Last updated 26 September 2003

Data can be displayed in many different ways. You may recall in the previous lesson, we were introduced to the box-and-whisker plot. A box-and-whisker plot, or simply a box plot, is a graphical representation of the distribution of numerical data. Box plots highlight certain elements of a data set: the median of the entire set, the lower quartile, the upper quartile, the lower extreme, and the upper extreme. These five values are essential for both interpreting and constructing a box plot. At this site, we will learn how to make a box plot.

First, let's make sure we understand the terms associated with box-and-whisker plots. If you do not remember all or some of the words mentioned above, please take a minute to review. When you are confident with your knowledge of box-and-whisker plot facts, continue on to learn how to make one.

Step-by-Step

Step 1

Collect and organize data

Step 2

Create a number scale

Step 3

Determine the median of the data set and plot it

Step 4

Determine the lower quartile and plot it

Step 5

Determine the upper quartile and plot it

Step 6

Determine the lower and upper extremes and plot them

Step 7

Create the box and whiskers

Step 8

Title your box plot appropriately

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