Question 1

Can percent error be greater than 100%?

Accepted Answer

Yes. If the measurement is more than twice the true value, or of the wrong sign, the error exceeds 100%.

Question 2

What is the difference between percent error and percent difference?

Accepted Answer

Percent error compares a measurement with a known reference. Percent difference compares two values when neither is the reference, dividing by their average.

Question 3

Is percent error the same as accuracy?

Accepted Answer

It is one way to express accuracy, meaning closeness to the true value. Precision is different: it describes how close repeated measurements are to each other.

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