Accuracy and 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 multiple measurements are to each other, regardless of whether they are close to the actual value.

Front

Which is more important in scientific measurements: accuracy or precision?

Back

Both accuracy and precision are important; accuracy ensures correctness, while precision ensures consistency.

Front

How do you calculate percent error?

Back

Percent Error = |(Measured Value - Actual Value)| / Actual Value x 100%.

Front

If a student measures a length as 10.00 cm and the actual length is 10.50 cm, what is the percent error?

Back

Percent Error = |(10.00 - 10.50)| / 10.50 x 100% = 4.76%.

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 is an example of a precise measurement?

Back

Measuring the length of a table multiple times and getting 150.0 cm each time.

Tags

NGSS.MS-PS3-4

Front

What is an example of an accurate measurement?

Back

Measuring the length of a table and getting 150.0 cm when the actual length is 150.0 cm.

Front

What is the relationship between accuracy and precision in a dart game?

Back

If darts land close to the bullseye (accurate) and close to each other (precise), it indicates both high accuracy and precision.

Front

What is systematic error?

Back

Systematic error is a consistent, repeatable error associated with faulty equipment or a flawed experiment design.

Tags

NGSS.MS-PS2-5