The example that is most commonly given to illustrate the concepts of accuracy and precision is that of a target shot by arrows. If you shoot a quiver of arrows at a target, several outcomes are possible. If all of the arrows that you shoot go straight to the bulls-eye, then your aim is both accurate and precise. If, however, the arrows cluster in an area immediately to the right of the bulls-eye, your aim is precise, but not accurate. If, like me, your aim is bad and the arrows hit positions scattered all over the target, then your aim is neither accurate nor precise. |