Difference Between Accuracy And Precision

When it comes to the matter of measuring an item or substance, the topic of discussion turns from the item to the accuracy or precision of the measurement. Both these terms are used interchangeably quite often but they are not one and the same.

What is Accuracy?

Accuracy would be referred as the level of correctness of a measurement when compared to its true value.

What is Precision?

Precision on other hand refers to the level of absolute exact the measurement is to the most strict manner.

Accuracy And Precision

Difference Between Accuracy And Precision

In simple terms, precision is the term used to see how reliable and consistent the measurement of the experiment is while accuracy on other hand checks the closeness of the experiment measurement with the ideal or accepted value.

An ideal analogy to remember accuracy and precision is to remember a basketball player trying to shoot at the baskets where if the player would shoot with the most accuracy the ball would land either close or into the basket. If the player would try to shoot with precision, the ball would land in the exact location which would be either close or not close to the basket. A true player would be accurate and precise at the same time by shooting the ball always into the basket.

             Basis          Accuracy        Precision
Definition It could be defined as the level of correctness of a measurement to its true value. It could be defined as the sharp exactness of a measurement.
Measurement Method Has one factor used for measuring. Has multiple factors for measurement.
Mutual  Relationship Accurate items have to be precise in most cases. Precise items may or may not be accurate.

The points mentioned below are an indication of how the terms accuracy and precision vary from one another despite being used by people interchangeably on most occasions. For more information on topics like uncertainty in measurement, visit Byju’s.com


Practise This Question

If an endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its boiling point, then: