The main averages, which can also be referred to as measures of central tendency, are the mean, mode and median. Robert is preparing for his Mathematics GCSE exams. Each paper is marked out of 100.

The shape of any distribution can be described by its various ‘moments’. The first four are: 1) The mean, which indicates the central tendency of a distribution. 2) The second moment is the variance, ...

You can also get more information from your data by giving a measure of central tendency and a measure of spread. The different types of average are all worked out differently. This means that for ...