Variance and Standard Deviation
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Why spread matters

Why spread matters

Two horizontal dot plots labelled Set A and Set B, both centred on mean 5, with Set A at 4, 5, 6 and Set B at 1, 5, 9 to show different spread

A measure of location, such as the mean, tells you where the data is centred. A measure of spread tells you how tightly the values cluster around that centre.

Variance and Standard Deviation Lesson

  1. AS Level
  2. /Maths
  3. /Variance and Standard Deviation