1. "What makes certain people faster than others?"
2. Sally was concerned after she noticed her friend was faster than her.
3. The height of Sally's classmates
4. I would say quantitative because it is the time in numbers it took each person to run the mile.
5. The heights of her classmates, how much they excersize, etc.
6. Everyone ran one mile, all of the classmates are girls, etc.
7. There is no control group.
8. There was only one trial in this experiment.