Na? Wer schummelt denn da?

Die Frage lässt sich mit der statistischen Keule lösen und visuell als Scatter Map aufbereiten.

The diagonal line indicates two students who had the exact same wrong and right answers. No pair of students did this, but there were four outlying pairs that got close, shown in red. And looking back at the seating arrangements, in a class of 200 students, all four pairs were students who sat adjacent to each other.