Which is not a critical part of designing a good experiment?
A) All of these are important.
B) Replication of the on a sufficient number of subjects.
C) Random assignment of subjects to treatments.
D) Random selection of subjects.
E) Control of known sources of variability.

Question

Quizplus · Accepted Answer

Random selection of subjects is not always necessary for a good experiment, especially if the goal is to establish causality rather than generalize to a larger population. Random assignment and control of variability are more critical for internal validity.

Which Is Not a Critical Part of Designing a Good