0.4 0.5 D 0.4 B D Outcome P(A n C) = P(A n D) P(B n C) = P(B n D) =

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.