DQ: Accuracy and Precision

Front

What is Precision?

Back

Precision is a measure of how close measurements come to each other when they are made in the same way.

Front

What does it mean if measurements are Precise but not Accurate?

Back

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

Front

What is Accuracy?

Back

Accuracy refers to how close a measurement is to the true value (or bullseye).

Front

How would you describe a set of data that is not accurate and not precise?

Back

The data is neither close to each other nor close to the actual value.

Front

What does it mean if a set of data is Precise?

Back

It means that all the measurements are close to each other, but they may not be close to the actual value.

Front

What is the difference between Accuracy and Precision?

Back

Accuracy is about closeness to the true value, while precision is about consistency among measurements.

Front

If a bullseye shows measurements that are accurate and precise, what does that indicate?

Back

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

Front

What is an example of being Accurate but not Precise?

Back

A set of measurements that are all over the target but average out to the bullseye.

Front

What is an example of being Precise but not Accurate?

Back

A set of measurements that are all clustered together but far from the bullseye.

Front

What is a common misconception about Accuracy and Precision?

Back

Many people think that being precise means being accurate, but they are different concepts.