Which of the following is not one of the four principles of experimental design?
A)Control
B)Replicate
C)Randomize
D)Blocking
E)Placebo

Question

Quizplus · Accepted Answer

Placebo is not one of the four principles of experimental design. The four principles are Control, Replication, Randomization, and Blocking. Placebo is a treatment used in controlled experiments to test the effectiveness of another substance, but it is not a principle of design itself.

Which of the Following Is Not One of the Four