If we have the possibility of different numbers of subjects in each of two groups, we will maximize our power if
A) we put most of the subjects in the group we care most about.
B) we put most of the subjects in the group we care least about.
C) we equalize the number of subjects in the two groups.
D) it doesn't make any difference so long as we maximize the total number of subjects overall.

Question

Quizplus · Accepted Answer

Equalizing the number of subjects in the two groups maximizes power by reducing variability and making the groups more comparable. If we put most of the subjects in one group over the other, it may create an imbalance in the groups and affect the validity of the results. Maximizing the total number of subjects is still important, but equalizing the number is the best choice.

If We Have the Possibility of Different Numbers of Subjects