English Explanatory Dictionary

standard deviation

English dictionary entry

Meanings

noun
  1. 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).

Pronunciation

LL-Q1860 (eng)-Flame, not lame-standard deviation.wav

Word forms

standard deviation standard deviations

Etymology

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

Synonyms

standard error sigma
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