Professor House believes that regular exercise boosts academic achievement.To find out if that is true,she compares,over the course of six months,the academic achievement of (1)a group of students who,by their own admission,get little or no exercise and (2)a group of students who exercise regularly.This is an example of a(n):

Question

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This is a quasi-experiment as the researcher is comparing two groups of students without randomly assigning them to the groups.

Professor House Believes That Regular Exercise Boosts Academic Achievement