Vol. 5, Issue 1, Part E (2019)

Abstract
This article is about the term used in probability theory and statistics. For other uses, see Expected value (disambiguation). In probability theory and statistics, the expected value (or expectation value, or mathematical expectation, or mean, or first moment) of a random variable is the integral of the random variable with respect to its probability measure. For discrete random variables this is equivalent to the probability-weighted sum of the possible values, and for continuous random variables with a density function it is the probability density- weighted integral of the possible values.