A/B Testing model

Hi all, I’m trying to understand de A/B testing fórmula, when I check the topic in google I found that the formula is: n = (Zα/2+Zβ)2 * (f1p1(1-p1)+f2p2(1-p2)) / (p1-p2)2 , where p1 , p2 are the expected sample proportions of the two groups. But this not give the same result ! (I also can’t find the “power probably:
ZB” in the course)

This topic was automatically closed 41 days after the last reply. New replies are no longer allowed.