If you are interested in how well students perform on a standardized math achievement test after they have completed a six-week math unit in either a computer-assisted class, a videotaped course, or a regular classroom, what kind of design do you have (there is no pre-test)?
A. A 3 × 3 between-subjects, factorial design
B. A 2 × 2 between-subjects, factorial design
C. A 3 × 3 between-subjects, incomplete factorial design
D. A one-way design