This subsection looks at two ways of finding an ‘average?. The first produces the mean, which is what was originally meant by ‘average?, and what most people think of when they talk about an average. The second gives the median, which might more accurately be described as a ‘typical? or middle value. They will be illustrated using the following batch of heights.
The heights in metres (measured to the nearest centimetre) of a group of seven people are as follows.
The number of values in the batch (the batch size) is seven.
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