Box plots
A A box plot is used to display information about the range, the median and the quartiles. or box and whisker plot is used to display information about the Range is the difference between the highest and lowest values in a set of data., the median and the The collective term for the lower quartile and upper quartile of a set of data..
A box plot shows the following:
- lowest value
- lower quartile
- median
- upper quartile
- highest value
A box plot is usually drawn alongside a number line, as shown:
Example
The oldest person in Mathsminster is 90. The youngest person is 15.
The median age of the residents is 44, the lower quartile is 25, and the upper quartile is 67.
Represent this information with a box-and-whisker plot.