variance vs standard deviation

standard deviation vs variance

variance and standard deviation both are nouns.

Word	Noun	Adjective	Verb	Adverb
variance	Yes	No	No	No
standard deviation	Yes	No	No	No

As nouns, standard deviation is a hyponym of variance; that is, standard deviation is a word with a more specific, narrower meaning than variance:

variance: the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value
standard deviation: the square root of the variance

Other hyponyms of variance include covariance.

variance (noun)	standard deviation (noun)
an activity that varies from a norm or standard	the square root of the variance
an official dispensation to act contrary to a rule or regulation (typically a building regulation)
a difference between conflicting facts or claims or opinions
the quality of being subject to variation
the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value
discord that splits a group
an event that departs from expectations

Difference between variance and standard deviation

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