wRv

wRv is an acronym encountered in several domains, without a universal definition. In statistics and probability, wRV is sometimes used informally to denote a weighted random variable—a random variable whose distribution is modified by a weight function w. The weighted expectation is defined by E_w[f(X)] = sum f(x) w(x) p(x) / sum w(x) p(x) (or the integral version).

In computing and data validation contexts, wRv is occasionally used for Web Resource Validator or similar tools, referring to utilities that check web resources for conformance to standards, integrity, or metadata quality. However, there is no widely adopted, official tool universally known by this acronym, and usage varies by organization.

In other domains, wRv may surface as an internal project code, a model name, or an acronym for organizations; such uses are highly context-dependent. When encountering wRv, it helps to examine the accompanying definitions, field abbreviations, or documentation to determine the intended meaning.

See also: RV (random variable), weighted mean, importance sampling.