Accuracy and precision are both about how good your guesses are, but they mean different things.
Imagine you're trying to hit a bullseye on a dartboard. Accuracy is like how close your darts are to the center, if most of them land near the middle, you're accurate. Precision is like how close your darts are to each other, if all your darts cluster together, even if they’re not near the bullseye, you're precise.
When Accuracy Matters
When Precision Matters
But if you're drawing a picture with a ruler, being precise is more important. If your lines are all wobbly and uneven, even if they’re close to the right length, your picture won’t look neat. It's about consistency.
So accuracy is about how close you are to the correct answer, and precision is about how consistent your answers are, like hitting the same spot on the dartboard every time, whether it’s near the center or not.
Examples
- A dartboard where darts are all clustered near the center (accurate and precise)
- A dartboard where darts are scattered all over (neither accurate nor precise)
- A dartboard where darts are clustered but far from the center (precise but not accurate)
Ask a question
See also
- How Does Accuracy and Precision | It's Easy! Work?
- What is accuracy?
- How Does Adam Savage's Most Precise Measurement Tool! Work?
- How Does Accuracy and Precision for Data Collection Work?
- What is metrology?