4 options: A study was conducted to determine the effects of practice and fatigue on muscle strength. A random sample of 10 police recruits on their first day at the police academy were selected and asked to do as many push-ups as possible. After a five-minute break, they were asked to do as many push-ups as possible again. Is there a difference in push-ups completed by timing? ___________ is the dependent variable in this problem. ___________ is the independent variable in this problem. ___________ is the appropriate statistical test to use for this