An engineer, a statistician, and a physicist are out hunting.

They spot a deer, and each takes a turn to try and bag it.

The physicist goes first. He pulls out his lab book and quickly calculates the trajectory of the bullet, assuming it is a perfect sphere in a vacuum. The bullet falls 20m short of the deer.

The engineer goes second. He pulls out his engineer's pad and book of projectile assumptions. After a few minutes, he’s ready, he takes aim, and he fires. The bullet lands 20m passed the deer.

The statistician leaps in the air shouting, “We got it!”