Vocabulary

Understand the term. Connect the concept.

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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Probability

Statistics & Probability · Level 1 of 5

Probability

A numerical measure of uncertainty assigned to an event.

Probabilities lie between zero and one under a specified model.

Example

A model assigns a 0.2 chance to rain tomorrow.

Listen to the definition and example

Audio transcript

Probability. A numerical measure of uncertainty assigned to an event. Probabilities lie between zero and one under a specified model. For example: A model assigns a 0.2 chance to rain tomorrow.

Explore this concept

A useful analogy

A calibrated share of uncertainty assigned to an event.

Why it matters

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

Technical detail

A probability measure is nonnegative, assigns one to the whole space, and is countably additive on disjoint events.

Common misconception

A probabilistic forecast is not a guarantee about one individual outcome.

Related concepts

Quick recall question

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Put the terminology into context: How AI works · Machine-native representations · All learning paths

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