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Averages and Frequency Polygons

This lesson can be used for revision for the higher Maths GCSE. The examples are quick and concise with exam style questions, go to GCSE Maths if you need more in-depth explanations.

How to work out averages from tables?
How to draw frequency polygons?

You may be asked to work out the following from the table:
1) Find the modal group or interval (mode)
2) Find the group or interval that contains the median
3) Find an estimate of the mean
4) Draw a frequency polygon from the given information
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