Range? Median? Mode? What does that Mean?

The different types of average is one aspect of the mathematics component of Secondary School Entrance Examinations (11+) and Common Entrance Examinations that many children find a stumbling block. The main issue that confronts pupils is remembering which form of average is which when faced with the mathematical meaning of the terms ‘range’, ‘mode’, ‘median’ and ‘mean’. Many children know how to calculate each form, but have trouble recalling the differences between the terms. Before I explore the different types of average, let’s have a...

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