There are three people applying for the same job. One is mathematician, one is statistician, and one is accountant.

The interviewing committee first calls in the mathematician. They say "we have only one question. What's 500 plus 500?" The mathematician, without hesitation, says "1000". The committee sends him out and calls in the statistician.

When the statistician comes in they ask the same question. The statistician ponders the question for a moment, and then answers "1000... I'm 95% confident." He is then also thanked for his time and sent on his way.

When the accountant enters the room, he was asked the same question: "What's 500 plus 500?" The account replies "what would you like it to be?"

They hire the accountant!