A researcher is interested in creating equivalent groups in her experiment. If potential extraneous variables are unknown, she should use _________ and if the extraneous variables are known, she should use __________.
A) balancing; elimination
B) balancing; randomization
C) randomization; balancing
D) elimination; balancing

Question

Quizplus · Accepted Answer

Randomization is used to create equivalent groups when extraneous variables are unknown, as it helps distribute these variables evenly across groups. Balancing is used when extraneous variables are known, to ensure they are equally represented in each group.

A Researcher Is Interested in Creating Equivalent Groups in Her