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Range

The range of a set of measures is simply the difference between the largest and the smallest measurement value. This is easy to calculate, but there are several problems with using it:

  • Special causes of variation can cause an unrealistically wide range.
  • As more measurements are made, it will tend to increase.
  • It gives no indication of the data between its values.

See also:

Variation, Spread, Standard Deviation

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