Why Statistics Often Miss The Truth

Statistical power measures your ability to catch an effect that is actually real. Most studies are designed poorly, meaning they fail to detect truth even when it is staring them in the face.

Think of power as a flashlight beam searching for a hidden object. If the beam is too narrow or weak, you will miss the truth even if it is right in front of you. Researchers often underestimate how many subjects they need to see a result, leading to experiments that are doomed to fail from the start. High power ensures that if something important is happening, your math will actually pick up on it.