Re:The Low Base Rate Problem (2014)
by bkfunk on Thursday April 14, 2022 @11:53AM
(#31028634)
Power is important if you want to distinguish between noise and true signals. In other words, if you care about P(real effect | significant).
From good ol' Bayes we get:
P(real|sig) = P(sig|real) x P(real) / P(sig)
P(sig|real) is the power; so if you have more power, all other things being equal (a bit of a weaselly caveat), the likelihood that your stat sig result is real is higher.
From good ol' Bayes we get:
P(real|sig) = P(sig|real) x P(real) / P(sig)
P(sig|real) is the power; so if you have more power, all other things being equal (a bit of a weaselly caveat), the likelihood that your stat sig result is real is higher.