Mine would be:
"Let's assume that had two good running backs, we'll call them R and P. Assume that in 2012, R averaged 6.2 yards per carry and P averaged 5.1. Would you give P 3.7 times the number of carries that you gave R? OK, OK, now let's assume that in 2013 R averaged 6.0 yards per carry and P averaged 4.8 yards per carry, would you continue to give P 2 times the number of carries?"
"Let's assume that had two good running backs, we'll call them R and P. Assume that in 2012, R averaged 6.2 yards per carry and P averaged 5.1. Would you give P 3.7 times the number of carries that you gave R? OK, OK, now let's assume that in 2013 R averaged 6.0 yards per carry and P averaged 4.8 yards per carry, would you continue to give P 2 times the number of carries?"