expected value (redirected from Mathematical expectancy)

ex·pect·ed value (k-spktd)

n.

1. The sum of all possible values for a random variable, each value multiplied by its probability of occurrence.

2. The integral of the probability density function and a continuous random variable over its range of values.

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expected value

n

(Mathematics & Measurements / 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

Thesaurus

Noun

1.

expected value - the sum of the values of a random variable divided by the number of values arithmetic mean, first moment, expectation statistics - 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