Average and spread

The presentation above on SlideShare shows how I introduce the idea of central tendency or location and the concept of spread or dispersion. Most Level 2 Access Maths get the idea and go on to compare frequency polygons drawn from supplied data sets and from data they collect themselves.

Comparing two distributions with similar means but different dispersions

The slide above brings home the idea of spread – I try to find illustrations relevant to the ‘pathway’ (easiest for the health professions students). Vocabulary is important in statistics so look out for some crosswords…

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