Accuracy and Precision

Describe a scenario with high accuracy and low precision.

• A scenario where measurements are clustered closely together but far from the true value.

• A scenario where measurements are spread out but the average is close to the true value.

• A scenario where all measurements are identical and equal to the true value.

• A scenario where measurements vary widely and the average is also far from the true value.

Tags

NGSS.MS-PS3-1

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

• Measuring the length of a table as 100 cm multiple times, but the actual length is 120 cm.

• Measuring the length of a table as 120 cm multiple times, and the actual length is also 120 cm.

• Measuring the length of a table as 90 cm multiple times, but the actual length is 100 cm.

• Measuring the length of a table as 110 cm multiple times, but the actual length is 120 cm.

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

• Measuring the length of a table as 120 cm, 130 cm, and 110 cm, with the true length being 120 cm.

• Measuring the length of a table as 120 cm, 121 cm, and 119 cm, with the true length being 120 cm.

• Measuring the length of a table as 100 cm, 100 cm, and 100 cm, with the true length being 100 cm.

• Measuring the length of a table as 130 cm, 130 cm, and 130 cm, with the true length being 130 cm.

What does a bullseye with all darts clustered together but far from the center indicate?

• High accuracy and low precision.

• High precision but low accuracy.

• Low accuracy and low precision.

• Low precision but high accuracy.

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

• Accuracy ensures correctness, while precision ensures consistency.

• Only accuracy is important for scientific measurements.

• Precision is the only factor that matters in scientific measurements.

• Neither accuracy nor precision is important in scientific measurements.

Describe a scenario with low accuracy and high precision.

• A scenario where multiple measurements yield values that are very close to each other but far from the true value.

• A scenario where measurements are widely spread and far from the true value.

• A scenario where all measurements are exactly equal to the true value.

• A scenario where measurements vary greatly but average out to the true value.

What is the relationship between accuracy and precision?

• Accuracy and precision are the same; both refer to the closeness of a measurement to the true value.

• A measurement can be accurate but not precise, precise but not accurate, both, or neither.

• Accuracy refers to the consistency of measurements, while precision refers to the closeness to the true value.

• Precision is more important than accuracy in all scientific measurements.

What is accuracy?

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

• Accuracy is the degree to which a measurement can be repeated under unchanged conditions.

• Accuracy is the difference between the measured value and the true value.

• Accuracy is the ability to measure the same value consistently over time.

Why is it important to understand the difference between accuracy and precision?

• It helps in evaluating the reliability of measurements and making informed decisions based on data.

• It allows for more accurate predictions in scientific experiments.

• It ensures that all measurements are identical and consistent.

• It simplifies the process of data collection and analysis.

Tags

NGSS.MS-PS1-2

NGSS.MS-ETS1-3

NGSS.MS-PS3-4

What is precision?

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

• Precision is the degree to which a measurement approximates the true value.

• Precision indicates the consistency of measurements over time.

• Precision is the ability to measure something accurately without error.