<p>Knowing the score distribution of 200 students doesn’t mean anything. Did you poll each and every one on how many hours they studied, and how confident they felt going into the exam, etc.? This information is necessary to draw your conclusion. I know some really bright kids who don’t have to study much to get a 5, but that doesn’t mean a thing for everyone else. The majority of us prepare adequately for the exams and get the scores we deserved.</p>