# expected value

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## ex·pect·ed value

(ĭk-spĕk′tĭd)*n.*

**1.**A quantity expressing a typical or average value of a random variable.

**2.**The sum (for discrete variables) or integral (for continuous variables) of the product of a random variable with its probability density function, over its range of values.

## expected value

*n*

(Statistics)

*statistics*the sum or integral of all possible values of a random variable, or any given function of it, multiplied by the respective probabilities of the values of the variable. Symbol:*E*(*X*).*E*(*X*) is the mean of the distribution;*E*(*X–c*) =*E*(*X*)–*c*where*c*is a constant. Also called:**mathematical expectation**ThesaurusAntonymsRelated WordsSynonyms

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Noun | 1. | expected value - the sum of the values of a random variable divided by the number of valuesstatistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters mean, mean value - an average of n numbers computed by adding some function of the numbers and dividing by some function of n |

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