Watch the animation for calculating mean and then consider the question below.

**Why use this technique? Is it appropriate?**

The mean is the most common measure of central tendency. It is sometimes referred to as the ‘average’. Calculating the mean is a way to summarise values when you have a large set of data that is evenly spread and does not include anomalies. For instance if you wanted to find the average temperature over a month then calculating the mean would be the most useful.