Answer:
D, 60, 10
Explanation:
A 3 x 2 factorial is a design that considers two different factors at 3 and 2 levels. Since at least 10 subjects in needed per treatment condition, to get the total number of the subject is calculated below;
no of plots experimental plots therefore;
3 x 2 = 6
since 10 subjects in needed per experimental plot, total number of subjects therefore;
6 x no of subjects
6 x 10 = 60subject.
10 subjects will be required between the subjects version of the study.