Definitions for varianceˈvɛər i əns
This page provides all possible meanings and translations of the word variance
Random House Webster's College Dictionary
var•i•anceˈvɛər i əns(n.)
the state of being variable or different.
an instance of varying.
Statistics. the square of the standard deviation.
the number of degrees of freedom of a physical system.
Law. a discrepancy, as between two sworn statements. a departure from the cause of action originally stated in a legal complaint.
a permit to do something normally regulated by law.
a disagreement or dispute.
Idioms for variance:
at variance, in a state of disagreement.
Origin of variance:
1300–50; ME < L
discrepancy, variance, variant(noun)
an event that departs from expectations
discord that splits a group
the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value
discrepancy, disagreement, divergence, variance(noun)
a difference between conflicting facts or claims or opinions
"a growing divergence of opinion"
variability, variableness, variance(noun)
the quality of being subject to variation
an official dispensation to act contrary to a rule or regulation (typically a building regulation)
"a zoning variance"
an activity that varies from a norm or standard
"any variation in his routine was immediately reported"
The act of varying or the state of being variable
A difference between what is expected and what happens
The state of differing or being in conflict
A discrepancy, especially between two legal documents
The second central moment in probability
Origin: From variance.
the quality or state of being variant; change of condition; variation
difference that produce dispute or controversy; disagreement; dissension; discord; dispute; quarrel
a disagreement or difference between two parts of the same legal proceeding, which, to be effectual, ought to agree, -- as between the writ and the declaration, or between the allegation and the proof
In probability theory and statistics, the variance is a measure of how far a set of numbers is spread out. It is one of several descriptors of a probability distribution, describing how far the numbers lie from the mean. In particular, the variance is one of the moments of a distribution. In that context, it forms part of a systematic approach to distinguishing between probability distributions. While other such approaches have been developed, those based on moments are advantageous in terms of mathematical and computational simplicity. The variance is a parameter describing in part either the actual probability distribution of an observed population of numbers, or the theoretical probability distribution of a sample of numbers. In the latter case a sample of data from such a distribution can be used to construct an estimate of its variance: in the simplest cases this estimate can be the sample variance.
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