Accuracy & Precision

Front

What is the definition of accuracy?

Back

Accuracy refers to how close a measured value is to the actual (true) value.

Front

What is the definition of precision?

Back

Precision refers to how close the measured values are to each other, regardless of whether they are close to the actual value.

Front

What does high accuracy and high precision indicate?

Back

It indicates that the measurements are both close to the actual value and close to each other.

Front

What does low accuracy and high precision indicate?

Back

It indicates that the measurements are close to each other but far from the actual value.

Front

What does high accuracy and low precision indicate?

Back

It indicates that the measurements are close to the actual value but not close to each other.

Front

What does low accuracy and low precision indicate?

Back

It indicates that the measurements are neither close to the actual value nor close to each other.

Front

If a set of measurements is both precise and accurate, what can be said about them?

Back

They are consistently close to the actual value and to each other.

Front

If a set of measurements is precise but not accurate, what can be said about them?

Back

They are consistently close to each other but not close to the actual value.

Front

If a set of measurements is accurate but not precise, what can be said about them?

Back

They are close to the actual value but vary widely from each other.

Front

What is an example of a measurement that is precise but not accurate?

Back

A set of measurements that are all 10.0 cm but the actual value is 12.0 cm.