Statisticians are to math what dentists are to the medical profession. Everyone knows that statisticians aren't real mathematicians, but we treat them like it to boost their self-esteem. And statisticians—like blondes—are great targets for jokes.
Two statisticians are on an airplane. Suddenly, they hear a huge crash. They hear the pilot over the loudspeaker:
"Attention all passengers, we have lost an engine. Fortunately, we should be able to make it to our destination with our three remaining engines. Estimated flying time is now at about 4 hours."
The staticians hear this and are put at ease. They continue to talk together when they're interrupted by second crash, and the sound of the loudspeaker again.
"Attention all passengers, we have just lost a second engine. We should still be okay on 2 engines, but we probably won't reach our destination for at least 6 hours."
Well, the staticians have time to burn and books to read, so they don't bother worrying about this new development. Suddenly, there's another crash, and the pilot's anxious voice comes over the loudspeaker:
"Attention all passengers, we're now flying with only one engine left. It will take us at least 8 hours to reach our destination now."
One statistician turns to the other and says,
"Gee, if we lose one more engine, we'll be flying all night!"