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Bayes’s theorem
Introduction References & Edit History Quick Facts & Related Topics
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Understand how Bayes's theorem can make educated mathematical guesses when there is not much to go on
A diagram illustrating Bayes's theorem using a group of 10,000 intravenous drug users, showing 2,500 are infected with HIV and 7,500 are not; within those tested, 2,375 true positives and 30 false positives are highlighted to demonstrate conditional probability.

Bayes’s theorem: References & Edit History

Article Contributors

Primary Contributors

  • Richard Routledge
    Professor of Statistics at Simon Fraser University, British Columbia, Canada.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Modified link of Web site: Mathematics LibreTexts - Bayes' Theorem. Oct 30, 2026
Add new Web site: Frontiers - Frontiers in Psychology - Bayes’ Rule for Clinicians: An Introduction. Jul 23, 2026
Add new Web site: IOPscience - Journal of Physics: Conference Series - Bayes’ theorem, intentionality and free will in the brain’s functional activity. Nov 14, 2025
Add new Web site: UW Faculty Web Server - Bayes' Theorem. Jun 28, 2025
Add new Web site: Al-Mustaqbal University - Bayes' Theorem (PDF). May 13, 2025
Add new Web site: Frontiers - Frontiers in Psychology - Bayes’ Rule for Clinicians: An Introduction. Mar 17, 2025
Add new Web site: University of Notre Dame - Bayesďż˝ Theorem (PDF). Dec 18, 2024
Add new Web site: The University of Chicago - Department of Astronomy and Astrophysics - Derivation of Bayes Theorem. Oct 24, 2024
Add new Web site: Academia - Bayes Theorem and real-life applications. Sep 13, 2024
Add new Web site: LOUIS Pressbooks - Finite Mathematics - Conditional Probability and Bayes Theory. Feb 16, 2024
Add new Web site: University of Illinois - Data Science Discovery - Bayes' Theorem. Dec 05, 2023
Add new Web site: Purdue University Northwest - Bayes�s Theorem. Oct 13, 2023
Add new Web site: Corporate Finance Institiute - Bayesďż˝ Theorem. Jul 07, 2023
Add new Web site: Mathematics LibreTexts - Bayes' Theorem. May 23, 2023
Links added. Apr 19, 2023
Add new Web site: UW Staff Web Server - Bayes' Theorem (PDF). Dec 10, 2022
Add new Web site: Investopedia - What Is Bayes' Theorem? Sep 20, 2022
Media added. Feb 20, 2017
Corrected display issue. Dec 28, 2016
Material specifying Bayes's theorem added. Jan 11, 2013
Added new Web site: Stanford Encyclopedia of Philosophy - Bayes' Theorem. Mar 23, 2009
Article revised. Nov 10, 2005
New article added. Jun 16, 2005
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