Glossary · Reliability, calibration, and statistics
Statistical power
The probability that a test detects a real difference of a stated size. A low-power comparison that comes back "not significant" is weak evidence of absence, not evidence of no effect.
Also called: power
Defined in
Handbook · ValidationComparing systemsPair tasks, count discordant pairs, size for the smallest difference that matters, and never let significance stand in for validity.Where it comes up
- Notation and formula cardHandbook · Reference