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Understanding Blocking

APSTAT-1TF696

In the context of an experiment, blocking refers to

A

Dividing subjects up in the such a way that they are in the group they wish to join.

B

Performing the experiment on a variety of different subjects to make generalizing the results to the population more effective.

C

Dividing the subjects up in such a way that the subjects in each group have less variability.

D

Performing the experiment on many different people as a way to reduce variability.

E

Hiring a third party so that neither the subjects nor the people conducting the experiment know who gets what treatment.