Teacher resources icon


The range is a measure of the spread of a data set. The range of a set of numerical data is the difference between the largest data value and the smallest data value. For example:

The larger the range, the greater the spread of the data values.

Example 11 

A student obtained the following marks out of 50 in seven tests.

43 35 41 29 33 39 42

Calculate the range.


\begin{align}\text{Range}\ &=\ \text{largest data value – smallest data value}\\\\ &=43\ –29\\\\ &=14\end{align}