Randomized,controlled experiments are needed to accurately measure treatment effects without
A)the expense of having to treat everyone.
B)the risk of discrimination bias.
C)exposing everyone to untested treatments.
D)selection bias.

Question

Quizplus · Accepted Answer

Randomized, controlled experiments are designed to reduce or eliminate the effects of selection bias, in which groups may differ in ways that affect the outcome of the study. The other options listed are not necessarily reasons why randomized, controlled experiments are needed.

Randomized,controlled Experiments Are Needed to Accurately Measure Treatment Effects Without