Precision and Accuracy

Front

What is the definition of Precision?

Back

Precision refers to how close a set of measurements are to each other, regardless of whether they are close to the actual value.

Front

What is the definition of Accuracy?

Back

Accuracy refers to how close a measurement is to the accepted or true value.

Front

If a set of data is both accurate and precise, what does that mean?

Back

It means that the measurements are close to each other and also close to the actual value.

Front

What does it mean if a measurement is precise but not accurate?

Back

It means that the measurements are consistent with each other but are not close to the true value.

Front

What does it mean if a measurement is accurate but not precise?

Back

It means that the measurement is close to the true value but the measurements vary widely from each other.

Front

What is an example of high precision and low accuracy?

Back

A set of measurements that are all very close to each other but far from the true value.

Front

What is an example of high accuracy and low precision?

Back

A measurement that is very close to the true value but varies significantly with repeated measurements.

Front

What is the relationship between accuracy and precision?

Back

Accuracy and precision are related but distinct concepts; a measurement can be accurate but not precise, precise but not accurate, both, or neither.

Front

How can you improve the accuracy of a measurement?

Back

By using calibrated instruments and following proper measurement techniques.

Front

How can you improve the precision of a measurement?

Back

By taking multiple measurements and using statistical methods to analyze the data.