In an experiment, subjects are put into two categories according to sex, and then each subject is randomly assigned a treatment . This is an example of...
A)gender bias
B)randomized blocking
C)confounding
D)observational studies

Question

Quizplus · Accepted Answer

Randomized blocking is used here, where subjects are first grouped into blocks (in this case, by sex) and then randomly assigned treatments within those blocks to control for the effect of sex on the outcome.

In an Experiment, Subjects Are Put into Two Categories According