Accuracy vs Precision

Front

What is the definition of accuracy in measurements?

Back

Accuracy refers to how close a measured value is to the true value or the actual value of the quantity being measured.

Front

What is the definition of precision in measurements?

Back

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

Front

What does it mean if a measurement is both accurate and precise?

Back

It means that the measured values are close to the true value and also close to each other.

Front

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

Back

It means that the measured value is close to the true value, but the values are spread out and not close to each other.

Front

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

Back

It means that the measured values are close to each other but far from the true value.

Front

What does it mean if a measurement is neither accurate nor precise?

Back

It means that the measured values are neither close to the true value nor close to each other.

Front

Give an example of high accuracy and high precision.

Back

A set of measurements that are all very close to the true value, such as measuring a length of 10.00 cm multiple times and getting 10.01 cm, 10.00 cm, and 9.99 cm.

Front

Give an example of high precision but low accuracy.

Back

A set of measurements that are very close to each other but far from the true value, such as measuring a length of 10.00 cm multiple times and getting 8.00 cm, 8.01 cm, and 8.02 cm.

Front

Give an example of low precision but high accuracy.

Back

A set of measurements that are close to the true value but vary widely, such as measuring a length of 10.00 cm and getting 9.50 cm, 10.50 cm, and 10.00 cm.

Front

What is the importance of using goggles during science experiments?

Back

Goggles protect your eyes from chemicals, heat, and sediments that could cause injury.