Guys, the first thing you learn in any stats class, or psychology class, or hell, a lot of classes, is, "correlation =/= causation." That means if you have two numbers that covary together, you don't automatically conclude that one is causing the other, because it may well be a third factor affecting both. In this case, lack of money leads to both not having a car and eating ****ty junk food, not to mention it correlates with lack of education which means a lack of ability to know how to eat well.