Numbers and measures

P-value

The probability of seeing a result at least as extreme as the one observed if there were no real effect.

  • Numbers and measures

Definition

The probability of seeing a result at least as extreme as the one observed if there were no real effect. A small p-value suggests the result is unlikely to be chance.

For your role

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Why it matters

It helps judge whether a result is likely to be real or chance.

Where it is used

Experiment results and research reports.