expected value

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ex·pect·ed value

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

(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 WordsSynonymsLegend:
Noun1.expected value - the sum of the values of a random variable divided by the number of valuesexpected value - the sum of the values of a random variable divided by the number of values
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
References in periodicals archive ?
A]]) be the interval linguistic variable, the expectation value of interval grey linguistic variable [?
The PES associated with the IBM Hamiltonian of equation (1) is given by its expectation value in the coherent state and can be written as:
Key financial indicators: Net present value and soil expectation value.
In both cases, in principle, operator A yields an expectation value which is known as first (trigonometric) moment, whereas B stands for the first derivative.
The choice, however, is mathematically particularly simple, so that one can explicitly calculate the expectation value, the variance, and the higher moments of the distribution for Pot.
j] are the expectation values of the mass in cell j for states |[Theta]> and |[Psi]> respectively (see Appendix A).
12) This expectation value is referred to in the United States as the "option privilege.
9), the expectation value of the gravitational mass operator per one electron is
According to the operational laws of the interval number and the triangular fuzzy number, solve the expectation value of each state in Table 1 in order to transform the risk decision matrix into a certain decision matrix Z = [[[z.
Systematic Error is the (mathematical) expectation value of the error.
One test run contained 32 such "die throws;" that is, for each run a sequence of 32 random numbers in the range from 0 to 15 was generated, and the score was defined as the sum of these numbers minus the chance expectation value of 260.

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