# Bayes' theorem

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Related to Bayes rule: conditional probability

## Bayes' theorem

[bāz′]
Etymology: Thomas Bayes, British mathematician, 1702-1761
a mathematic statement of the relationships of test sensitivity, specificity, and the predictive value of a positive test result. The predictive value of the test is the number that is useful to the clinician. A positive result demonstrates the conditional probability of the presence of a disease.

## theorem

(the'o-rem) [Gr. theorema, principle arrived at by speculation]
A proposition that can be proved by use of logic, or by argument, from information previously accepted as being valid.

### Bayes' theorem

See: Bayes' theorem.
References in periodicals archive ?
Savage RDM (Rational Decision Maker) I would hold many hypotheses--perhaps an infinity of them--in my head simultaneously, and would shift my beliefs from their prior values, before this instant, to posterior values according to Bayes rule.
He took certain rules about "rational decision making" as axiomatic, and deduced personal probability and Bayes rules from these.
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