Yes, this is incorrect.<p>Also the next sentence is wrong:<p>&gt;You’ll often see statistical power conveyed as P90 or 90%. In other words, if there’s a 90% chance A is better than B, there’s a 10% chance B is better than A and you’ll actually get worse results.<p>Having a test w&#x2F; 90% power means that if A is truly better than B (for one sided) or A is truly different than B (two sided), then you&#x27;ll detect it 90% of the time you run the test (on independent data).