Questions to ask?

I am writing about Illinois State University college students becoming overweight during their first semester. I am writing for ISU college students so the can stay healthy and incoming freshman that will arrive next year. I want to focus on the different reasons why college students become overweight. Some assumptions I have made was that social class, stress, or/and a change in their lifestyles. I  hope to answer if college students actually gain weight during the first semester of college or later on in their college lives. I plan to collect different statistics and doctors views on this particular topic. I will also interview my peers and ask them their opinion about this topic. The conclusion I have drawn is that college students have problems with weight management. I do not know if my conclusion is factual and that is a huge gap in my research.