In an actual exam for GCSE Statistics, it gave us a frequency polygon and asked us to compare two differences between it - I was thinking, "Where the hell is that other frequency polygon?" - so I just used the data, spent about 10 minutes on it wasting my time and then about a week later somebody asked me if I had drawn the other frequency polygon... Basically, I didn't read the question.
READ THE QUESTION
is my best advice to anyone reading.