Standard Deviation

nounid 5106·updated May 18, 2026

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The most widely used measure of dispersion of a frequency distribution introduced by K. Pearson (1893). It is equal to the positive square root of the variance. The standard deviation should not be confused with the root mean square deviation.

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Entity Type

Metric92%llm-generatedllm:claude-haiku-4-5

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Variants

3 surface forms

plural: Standard Deviations
possessive: Standard Deviation's
pluralpossessive: Standard Deviations'

Framework definitions

2 senses across 2 frameworks

Glossary of Statistical Terms1 senseview framework →

§1: The most widely used measure of dispersion of a frequency distribution introduced by K. Pearson (1893). It is equal to the positive square root of the variance. The standard deviation should not be confused with the root mean square deviation.

Wordset Dictionary1 senseview framework →

§1: the square root of the variance

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