The 5 hour energy drink should keep a person feeling awake while driving for 5 hours, regardless of their age. Stacy just doesn't believe it. So she has 50 twenty year olds, 50 thirty year olds, 50 forty year olds, and 50 fifty year olds consume a 5 hour energy drink, and then Stacy measured participants' awakeness after 5 hours of driving. What test should she use to analyze her results?
