Understanding Precision and Accuracy

What is the main difference between precision and accuracy in scientific terms?

• Both precision and accuracy mean the same in scientific terms.

• Precision is about repeatability, while accuracy is about being close to the true value.

• Precision is about being close to the true value, while accuracy is about repeatability.

• Precision and accuracy are unrelated concepts.

In the target example, what does it mean if all arrows hit the bullseye?

• The shots are neither accurate nor precise.

• The shots are both accurate and precise.

• The shots are accurate but not precise.

• The shots are precise but not accurate.

If a set of measurements are all close together but far from the true value, how would you describe them?

• Both accurate and precise.

• Neither accurate nor precise.

• Precise but not accurate.

• Accurate but not precise.

What does a large spread in a data set indicate about precision?

• The data set is not precise.

• The data set is accurate.

• The data set is precise.

• The data set is both accurate and precise.

How can a data set be accurate but not precise?

• When the data set is neither accurate nor precise.

• When the average is close to the true value but the spread is large.

• When all measurements are close to each other and the true value.

• When the spread is small and the average is far from the true value.