A two-factor study compares 2 levels of factor A and 3 levels of factor B with a sample of n = 5 participants in each treatment condition.This study uses a total of 25 participants.

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A two-factor study with 2 levels of factor A and 3 levels of factor B, each having 5 participants, results in 2 x 3 = 6 treatment conditions. With 5 participants in each, the total is 6 x 5 = 30 participants.

A Two-Factor Study Compares 2 Levels of Factor a and 3