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-deviationsOrigin 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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