9.7.

(a) Confound a 33 design in three blocks using the ABC2 component of the three-factor interaction. Compare your results with the design in Figure 9.7.

(b) Confound a 33 design in three blocks using the AB2C component of the three-factor interaction. Compare your results with the design in Figure 9.7.

(c) Confound a 33 design in three blocks using the ABC component of the three-factor interaction. Compare your results with the design in Figure 9.7.

(d) After looking at the designs in parts (a), (b), and (c)

and Figure 9.7, what conclusions can you draw?