Accuracy and Precision

What is the definition of accuracy?

• Accuracy is a measure of how precise a measurement is.

• Accuracy is the ability to perform a task with minimal errors.

• Accuracy is a measure of how consistent a measurement is.

• Accuracy is a statistical measure that determines how close a measured value is to the true value or target value.

What is the definition of precision?

• Precision is the measure of how large a measurement is.

• Precision is the measure of how consistent multiple measurements of the same quantity are.

• Precision is the measure of how close multiple measurements of the same quantity are to each other.

• Precision is the measure of how accurate a measurement is.

What is the difference between accuracy and precision?

• Accuracy is the closeness of a measured value to the true value, while precision is the closeness of measured values to each other.

• Accuracy is the consistency of a measurement, while precision is the correctness of a measurement.

• Accuracy is the measure of how precise a measurement is, while precision is the measure of how accurate a measurement is.

• Accuracy is the closeness of measured values to each other, while precision is the closeness of a measured value to the true value.

Give an example of an accurate measurement.

• Weight of an object using a bathroom scale.

• Volume of a liquid using a graduated cylinder.

• Length of an object using a ruler with millimeter markings.

• Temperature of a room using a thermometer.

Give an example of a precise measurement.

• measuring the length of an object using a ruler with millimeter markings

• measuring the volume of a liquid using a graduated cylinder

• measuring the temperature of a room using a thermometer

• measuring the weight of an object using a bathroom scale

Which term refers to how close a measurement is to the true value?

• validity

• reliability

• precision

• accuracy

Which term refers to how close multiple measurements are to each other?

• bias

• precision

• accuracy

• variability

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

• The measurement is far from the true value and lacks consistency or repeatability.

• The measurement is close to the true value and has consistency or repeatability.

• The measurement is close to the true value but lacks accuracy.

• The measurement is close to the true value but lacks consistency or repeatability.

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

• The measurement is close to the true or target value, but not consistent or reproducible.

• The measurement is close to the true or target value, but not precise or reproducible.

• The measurement is neither close to the true or target value, nor consistent or reproducible.

• The measurement is consistent and reproducible, but not close to the true or target value.

Why is it important to have both accuracy and precision in scientific measurements?

• To make the measurements more complicated and difficult to understand.

• To increase the chances of obtaining inaccurate results.

• To save time and resources by not focusing on accuracy and precision.

• To ensure reliable and valid measurements that are consistent and can be replicated.