Standard Deviation Definition

stăndərd
noun
A measure of variability equal to the square root of the arithmetic average of the squares of the deviations from the mean in a frequency distribution.
Webster's New World
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Other Word Forms of Standard Deviation

Noun

Singular:
standard deviation
Plural:
standard-deviations

Origin of Standard Deviation

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

    From Wiktionary

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