Accuracy Vs. Precision

Accuracy and precision are two words that are used frequently in science but are commonly mixed up. To help clarify read the information below:

Being accurate means close to what you are going for. Imagine a target with a bullseye in the center. Accurate shots would be those close to the bullseye while not accurate shots would be farther away from the bullseye. In science accurate results would be results that are close to the expected outcome.

Precise means being able to get the same thing over and over. In the bullseye target example you are precise if you shoot the same area again and again no matter how close or far from the bullseye you are. As long as you are in the same area again and again it is considered precise. In science results are precise if you get the same result over and over again.

It is possible to be accurate and precise at the same time if you get the same result over and over and that result is close to the expected result.