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wiki/concepts/Statistical-Significance.md

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+---
+title: "Statistical Significance"
+type: concept
+tags: [statistics, experimentation]
+sources: [project-management-experiment-tracker]
+last_updated: 2026-04-20
+---
+
+## Definition
+Statistical Significance indicates that an observed effect is unlikely to have occurred by random chance under the null hypothesis, according to a predefined threshold.
+
+## Core Principles
+- Define the alpha level before testing
+- Distinguish significance from business impact
+- Guard against multiple comparison inflation
+- Report confidence intervals and effect sizes
+
+## Related Concepts
+- [[Hypothesis Testing]]
+- [[A/B Testing]]
+- [[Power Analysis]]
+
+## Related Entities
+- [[Experiment Tracker]]
+