Moment (mathematics)

See also moment (physics). The concept of moment in mathematics evolved from the concept of moment in physics. The nth moment of a real-valued function f(x) of a real variable about a value c is It is possible to define moments for random variables in a more general fashion than moments for real values. See Moments in metric spaces.The moments about zero are usually referred to simply as the moments of a function. Usually, except in the special context of the problem of moments below, the function will be a probability density function. The nth moment (about zero) of a probability density function f(x) is the expected value of Xn. The moments about its mean μ are called central moments; these describe the shape of the function, independently of translation.
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