A physicist, an engineer and a statistician are out deer hunting, and spot, in the distance, a 12-point buck.

The physicist knowing the mass of the bullet, the mass of gunpowder in his shell and the distance to the deer, fires off a shot that hits the dirt 20 yards short of the deer.

The engineer, quickly estimating humidity, atmospheric density and wind speed and direction, fires off a shot and the dirt spurts up 20 yards beyond the deer.

The statistician pumps his fist and yells “You got him!”