Accuracy & Precision

Front

What is the definition of accuracy?

Back

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

Front

What is the definition of precision?

Back

Precision refers to the consistency of repeated measurements, regardless of whether they are close to the true value.

Front

Which measurement is more precise: 4.3 mL or 4.300 mL?

Back

4.300 mL is more precise because it has more decimal places.

Front

If a measurement is accurate but not precise, what does that mean?

Back

It means the measurement is close to the true value but varies widely in repeated trials.

Front

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

Back

It means the measurement is far from the true value and varies widely in repeated trials.

Front

What is an example of a precise measurement?

Back

A measurement of 4.25 mL is precise if repeated measurements yield similar results.

Front

How can you determine if a measurement is accurate?

Back

By comparing it to a known standard or accepted value.

Front

What is the significance of significant figures in measurements?

Back

Significant figures indicate the precision of a measurement and help convey the certainty of the data.

Front

What is the difference between accuracy and precision?

Back

Accuracy is about closeness to the true value, while precision is about consistency among repeated measurements.

Front

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

Back

If a scale consistently reads 5 grams when the true weight is 10 grams, it is precise but not accurate.