Which is important in designing a good experiment?
I. Randomization in assigning subjects to treatments.
II. Control of potentially confounding variables.
III. Replication of the experiment on a sufficient number of subjects.
A) II and III
B) I only
C) I and II
D) I, II, and III
E) I and III

Question

Quizplus · Accepted Answer

To design a good experiment, it is important to consider all three factors listed: randomization in assigning subjects to treatments, control of potentially confounding variables, and replication of the experiment on a sufficient number of subjects. Randomization helps to ensure that any differences observed in the groups being compared are due to the treatment and not due to chance or some other factor. Controlling potentially confounding variables helps to ensure that any observed effects are due to the treatment itself, rather than some other difference between the groups. Finally, replicating the experiment on a sufficient number of subjects helps to ensure that any observed effects are not simply due to chance or random variation. Therefore, the best choice is D: I, II, and III.

Which Is Important in Designing a Good Experiment