Understanding Accuracy and Precision

How is percent error calculated?

Which of the following best describes the difference between accuracy and precision?

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

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

• Accuracy and precision both refer to the same concept.

• Precision is more important than accuracy in all experiments.

Which of the following is an example of a precise but not accurate measurement?

• Measurements that are close to each other but far from the true value.

• Measurements that are close to the true value but vary widely.

• Measurements that are both close to each other and the true value.

• Measurements that are neither close to each other nor the true value.

What is the percent error if the measured value is 50 and the actual value is 45?

• 11.11%

• 10%

• 5%

• 12.5%

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

• To ensure that measurements are always accurate.

• To determine the reliability and validity of experimental results.

• To make sure that all measurements are precise.

• To avoid any errors in calculations.

If a thermometer consistently reads 2 degrees higher than the actual temperature, what can be said about its accuracy and precision?

• It is accurate but not precise.

• It is precise but not accurate.

• It is both accurate and precise.

• It is neither accurate nor precise.

What is the percent error if the actual value is 100 and the measured value is 95?

• 5%

• 4.76%

• 5.26%

• 6%

Which of the following statements is true about precision?

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

• Precision refers to how close a measurement is to the true value.

• Precision is the same as accuracy.

• Precision refers to the consistency of repeated measurements.

In an experiment, why might a scientist prioritize accuracy over precision?

• To ensure that all measurements are consistent.

• To ensure that the results are close to the true value.

• To reduce the number of measurements needed.

• To increase the speed of data collection.

What is the main goal of achieving high accuracy in scientific experiments?

• To ensure that all measurements are the same.

• To ensure that measurements are close to the true or accepted value.

• To reduce the cost of experiments.

• To increase the number of measurements taken.