Defined term · Statistics and inference
Statistical significance
A property of a result relative to a threshold, not a measure of effect size or of importance. The Institute reports effect sizes alongside any statement of significance as a standing drafting rule.
§1Statistical significance
§1.1Also known as
P value
§1.2Category
Statistics and inference — Terms describing how effects are estimated and how uncertainty is expressed.
§1.3Related terms
- Confidence interval — A range constructed so that, over repeated experiments, the stated proportion of such ranges would contain the true value. The Institute reports the interval alongside…
- Effect size — The magnitude of a difference, expressed on the scale of the outcome or standardised. A significant result with an effect size below the minimal clinically important…
Compound Evidence Institute · CEI-GT-080 · https://compoundevidence.com/glossary/statistical-significance/ · retrieved 30 July 2026