Leo+DadMade for Leo
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Concept · 4 steps · NESA MA4-DAT-C-02

Mean, Median, Mode and Range

Four little words that summarise a whole pile of numbers. Three of them are kinds of "average", one measures the spread — and knowing which to reach for is half the skill.

1Where it comes fromDrag dots on a line and watch the balance point, the middle, the spread. 2How to do itOrder, add, divide, subtract — one measure at a time, with a checker. 3Where it gets trickySort before the median, even counts, missing modes, sneaky outliers. 4Out in the wildWhich average is fairest — and working the mean backwards.
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