# Statistics/Summary/Averages

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## Averages[edit | edit source]

An average is simply a number that is representative of data. More particularly, it is a measure of central tendency. There are several types of average. Averages are useful for comparing data, especially when sets of different size are being compared. It acts as a representative figure of the whole set of data.

Perhaps the simplest and commonly used average the **arithmetic mean** or more simply mean which is explained in the next section.

Other common types of average are the **median, the mode, the geometric mean,** and the **harmonic mean,** each of which may be the most appropriate one to use under different circumstances.