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

Question

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A two-factor study with two levels of factor A and three levels of factor B with a sample of n = 5 participants in each treatment condition will use a total of (2 x 3 x 5) = 30 participants, not 25.

A Two-Factor Study Compares Two Levels of Factor a and Three