3
AssignmentMultiple Choice

Experimental Designs

Question 3 • NC-Math 4 CR

Which matched pairs design is appropriate, if any? Why?

Answer
A
Both designs are equally appropriate in this situation because randomization is used.
B
Design I is appropriate because the second design would confound fatigue with the effect of music.
C
Design II is appropriate because it allows us to compare each runner to themselves. This reduces a source of variability.
D
Neither design is appropriate. The best choice is a completely randomized design.