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A practical dictionary of 512 AI, machine learning, mathematics, and programming terms from HerbDev’s AI Vocabulary app. Start with a definition, explore an example, then follow the concepts behind it.

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Bayes' Theorem

Statistics & Probability · Level 2 of 5

Bayes' Theorem

A rule for updating probabilities using evidence and prior probabilities.

Posterior probability is proportional to likelihood times prior probability.

Example

A rare-event estimate combines test evidence with the event's base rate.

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Audio transcript

Bayes' Theorem. A rule for updating probabilities using evidence and prior probabilities. Posterior probability is proportional to likelihood times prior probability. For example: A rare-event estimate combines test evidence with the event's base rate.

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This helps you interpret numerical evidence without overstating what it establishes.

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