# Definitions for **variance**ˈvɛər 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.

**Category:**Statisticsthe number of degrees of freedom of a physical system.

**Category:**PhysicsLaw. a discrepancy, as between two sworn statements. a departure from the cause of action originally stated in a legal complaint.

**Category:**Lawa permit to do something normally regulated by law.

**Category:**Governmenta disagreement or dispute.

#### Idioms for **variance**:

at variance, in a state of disagreement.

**Category:**Idiom

#### Origin of **variance**:

1300–50; ME < L

### Princeton's WordNet

discrepancy, variance, variant(noun)

an event that departs from expectations

division, variance(noun)

discord that splits a group

variance(noun)

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

variance(noun)

an official dispensation to act contrary to a rule or regulation (typically a building regulation)

"a zoning variance"

variation, variance(noun)

an activity that varies from a norm or standard

"any variation in his routine was immediately reported"

### Wiktionary

variance(Noun)

The act of varying or the state of being variable

variance(Noun)

A difference between what is expected and what happens

variance(Noun)

The state of differing or being in conflict

variance(Noun)

A discrepancy, especially between two legal documents

variance(Noun)

The second central moment in probability

**Origin:** From variance.

### Webster Dictionary

Variance(noun)

the quality or state of being variant; change of condition; variation

Variance(noun)

difference that produce dispute or controversy; disagreement; dissension; discord; dispute; quarrel

Variance(noun)

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

### Freebase

Variance

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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"variance." *Definitions.net.* STANDS4 LLC, 2014. Web. 24 Apr. 2014. <http://www.definitions.net/definition/variance>.