Random assignment depends on the idea of probabilistic equivalence.

Question

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Random assignment involves assigning participants to different groups or conditions in a way that ensures each participant has an equal chance of being assigned to any given group. This process creates probabilistic equivalence between the groups, meaning that any differences observed between the groups are more likely to be due to the manipulation of the independent variable rather than preexisting differences between the participants.

Random Assignment Depends on the Idea of Probabilistic Equivalence