In this article we will see the difference between accuracy and precision terms. They are also most confusing terms in measurements regarding instruments.

### Accuracy

Accuracy is the closeness with which the instrument reading reaches the true value of quantity being measured.

- The accuracy of measurement means conformity to truth.
- The accuracy can be improved.
- Accuracy simply depends upon the techniques of analysis.
- Accuracy is necessary but not sufficient condition for precision.

### Precision

Precision is a measure of reproducibility of the measurement, i.e. given a fixed value of quantity or the degree of exactness for which instrument is designed or intended to perform.

- Precise means clearly or sharply defined.
- Precision can not be improved.
- Precision requires many sophisticated techniques of analysis.
- Precision is necessary but not sufficient condition for Accuracy.

The

**difference between Accuracy and Precision**can be better understand from below common example of target shooting experiment.**Excercise**

Q1. Define Accuracy.

Q2. Define Precision.

Q3. Differentiate between Accuracy and Precision.

Q4. Explain with an example that accuracy can be improved while not the precision.

Accuracy and Precision