expected value

noun

1. Statistics, Mathematics. mathematical expectation.

expected value

noun

1. 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 calledmathematical expectation

Word History and Origins

Origin of expected value¹

First recorded in 1945–50