standard deviation

English edit

Etymology edit

Coined by English mathematician Karl Pearson in 1894 in his paper "On the dissection of asymmetrical frequency curves".

Noun edit

standard deviation (plural standard deviations)

  1. (statistics) A measure of how spread out data values are around the mean, defined as the square root of the variance. Represented with the Greek letter σ (sigma).

Synonyms edit

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Further reading edit