For each of the following scenarios, draw an interaction plot (like that in Figure 18.3-2) showing the results of a hypothetical experiment having two factors, A and B, each having two groups, in which there is

a. A main effect of A, no main effect of B, and no interaction between A and B;

b. A main effect of A, a main effect of B, and an interaction between A and B;

c. No main effect of A or B, and an interaction between A and B.

 Figure 18.3-2

Transcribed Image Text:

Square-root surface area (cm) 40 30 20 T 10- 0 Absent Herbivory treatment Mid Low Present