When one of the matching techniques is used,
A) randomizing techniques are no longer needed.
B) randomizing should still be used where possible.
C) the possibility of confounding of the experiment is eliminated.
D) generalization to the population is assured.

Question

Quizplus · Accepted Answer

Matching techniques are used to control for confounding variables in observational studies, but they do not replace the need for randomization, which helps to ensure that the treatment groups are comparable in terms of both observed and unobserved variables. Randomization also contributes to the validity of causal inferences. Matching does not eliminate the possibility of confounding entirely nor does it assure generalization to the population, as it depends on the specific characteristics of the matched subjects.

When One of the Matching Techniques Is Used