Dr. Lopez is a researcher in child safety. He studies when and how kids learn to ride a bicycle on their own with his research team. The following are some research topics that Dr. Lopez's group is thinking about looking into further. Please specify which test and why they should use for each item.

Research question	Whicht test should the research team use?	Why should the research team use thist test?
1. Will children learn to ride a bike at a younger age if they begin with a balance bike (a bike without any pedals) than if they begin with a bike with training wheels?
2. Compared to other 7-year-olds, are children more likely to wear a helmet if they take a bicycle safety training course?
3. Compared to before learning to ride a bike, do children show improvements in physical coordination after learning to ride a bike?