What is The Difference Between Precision and Accuracy?
Difference between precision and accuracy
For instance:
- A number that is not precise but accurate.
- A number that is not accurate but precise.
- A number that is precise and accurate.
Precision is the amount of information that is conveyed by a value. Whereas Accuracy is the measure of correctness of the value in correlation with the information.
Let’s consider the value of “pi”, i.e, 3.142857143.
According to the questions:
A number that is not precise but accurate is 3.14. It is accurate based on closeness and no other number with three digits can get closer to the target.
A number that is not accurate but precise is 1.1423345678901234567890. It is very precise as it conveys more information. But cannot be considered as accurate because it’s not near the target.
A number that is precise and accurate is 3.142857143. It is the only number which has maximum accuracy and precision if the target value is 3.142857143.
The above figure shows a dart game having three images,
- The first one shows Good accuracy and good precision, as all the three darts are are close to maximum score region (accurate) and also all the darts are close to each other (precise).
- The second figure shows Poor accuracy but good precision, as all the three darts are close enough but far away from the maximum score region.
- The third figure shows Poor accuracy and poor precision, as all the darts are neither nearby nor to the maximum score region.