A physicist, an engineer, a mathematician, and a statistician were all staying at the same hotel. One night, the physicist wakes up to see that his trash can is on fire. He quickly grabs a bucket of water and puts the fire out. The engineer is also sleeping and wakes up to see that his trash can is on fire as well. He pulls out his calculator and calculates the exact amount of water necessary to put the fire out. He then proceeds to actually put the fire out. The mathematician likewise wakes up to see his trash can on fire. He pulls out his calculator and calculates that water can be used to put fires out. He then returns to his bed. The statistician continues setting trash cans on fire to get a larger sample size.