Accuracy and Precision

What is the definition of Precision?

• Precision refers to how close multiple measurements 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.

What is the significance of significant figures in measurements?

• They indicate the precision of a measurement and help convey the uncertainty in the measurement.

• They are used to calculate the average of a set of measurements.

• They determine the color of the measurement instrument.

• They are only important in scientific research, not in everyday measurements.

What is an example of a situation with High Accuracy & Low Precision?

• A set of measurements that are 9.5 cm, 10.5 cm, and 10.0 cm when the true value is 10.0 cm.

• A set of measurements that are 10.0 cm, 10.0 cm, and 10.0 cm when the true value is 10.0 cm.

• A set of measurements that are 9.0 cm, 9.5 cm, and 10.5 cm when the true value is 10.0 cm.

• A set of measurements that are 10.5 cm, 10.5 cm, and 10.5 cm when the true value is 10.0 cm.

What is the definition of Accuracy?

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

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

• Accuracy indicates the level of precision in a measurement process.

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

How can you improve accuracy in measurements?

• By using uncalibrated instruments

• By using calibrated instruments and following proper measurement techniques

• By ignoring measurement techniques

• By using any available tools without checking their accuracy

What is an example of a situation with Low Accuracy & Low Precision?

• A set of measurements that are 8.0 cm, 12.0 cm, and 15.0 cm when the true value is 10.0 cm.

• A set of measurements that are 10.0 cm, 10.1 cm, and 9.9 cm when the true value is 10.0 cm.

• A set of measurements that are 5.0 cm, 5.1 cm, and 5.2 cm when the true value is 10.0 cm.

• A set of measurements that are 10.0 cm, 10.0 cm, and 10.0 cm when the true value is 10.0 cm.

What does High Accuracy & Low Precision mean?

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

• It means that the measurements are far from the true value but close to each other.

• It means that the measurements are both close to the true value and close to each other.

• It means that the measurements are neither close to the true value nor close to each other.

What does Low Accuracy & Low Precision mean?

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

• It means that the measurements are neither close to the true value nor close to each other.

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

• It means that the measurements are accurate but not precise.

How does estimation relate to accuracy?

• Estimation has no effect on accuracy.

• Estimation can improve accuracy if done correctly.

• Estimation can affect accuracy if the estimated value is far from the true value.

• Estimation is always more accurate than measurement.

Why is it important to distinguish between accuracy and precision?

• It helps in evaluating the reliability of measurements and improving experimental results.

• It allows for more complex calculations in scientific research.

• It ensures that all measurements are taken at the same time.

• It simplifies the process of data collection.