📊Statistical Power Calculator
0.2=small, 0.5=medium, 0.8=large
Statistical power (1−β) is the probability of correctly detecting a true effect. Power of 0.80 (80%) is the conventional minimum — a 20% chance of missing a real effect (Type II error).
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Did You Know?
A 2013 analysis found median statistical power in neuroscience studies was only 8–31% — meaning most studies were far too small to reliably detect the effects they were testing.
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