variance vs deviation

deviation vs variance

variance and deviation both are nouns.

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

As nouns, deviation is a hypernym of variance; that is, deviation is a word with a broader meaning than variance:

variance: an event that departs from expectations
deviation: a variation that deviates from the standard or norm

Other hypernyms of variance include departure, difference, divergence.

variance (noun)	deviation (noun)
an activity that varies from a norm or standard	deviate behavior
an official dispensation to act contrary to a rule or regulation (typically a building regulation)	a turning aside (of your course or attention or concern)
a difference between conflicting facts or claims or opinions	the error of a compass due to local magnetic disturbances
the quality of being subject to variation	the difference between an observed value and the expected value of a variable or function
the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value	a variation that deviates from the standard or norm
discord that splits a group
an event that departs from expectations

Difference between variance and deviation

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