### Home > CCA2 > Chapter 9 > Lesson 9.3.2 > Problem9-89

9-89.

Coach Pham claims that his new $6$-week agility program will increase an athlete's vertical leap by $10$ centimeters more than traditional workouts. Homework Help ✎

1. Design an experiment to test the coach’s claim.

Make sure you have a 'treatment' group and a 'placebo' group.
Remember to come up with a method for randomly assigning athletes to each group.

2. If the group using Coach Pham’s techniques improved their leaping significantly more than the group using traditional methods, would this provide evidence that the new agility program is the cause?

Can an experiment show cause and effect?
Did you choose a large sample size or a small sample size?