How is precision defined in the context of breath alcohol testing?

In the context of breath alcohol testing, precision is defined as the consistency of repeated measurements. This means that if a test is repeated multiple times under the same conditions, precision refers to how close the results of those repetitions are to each other. A precise instrument will yield similar results upon repeated tests, which is crucial in breath alcohol testing to ensure reliability.

Understanding precision is vital because high precision indicates that any variations in results are minimal, thus reinforcing confidence in the testing process. This is different from accuracy, which involves how close the measured results are to the true value. In breath alcohol testing, achieving high precision contributes to the overall trustworthiness of the test results in legal and safety contexts.