Ohio Lead Risk Assessor Practice Exam

Precision is defined as the degree to which repeated measurements under unchanged conditions show the same results. This means that if you were to take multiple measurements of the same thing, a high level of precision would indicate that those measurements are very close to one another, regardless of whether they are close to the true value.

The correct answer highlights that precision is fundamentally about the consistency of measurements. High precision shows that the technique or method of measurement produces consistent results, which conveys reliability in repeated tests. This characteristic can exist even if the measurements themselves are not accurate, as they could all be consistently off from the true value, underscoring the notion that precision does not inherently account for correctness, merely for reliability and repeatability.

In contrast, other options focus on aspects that do not define precision. The focus on measurement frequency, for example, pertains more to the statistical reliability of data collection rather than the concept of precision itself. Similarly, relating precision solely to technique or implying it is valid regardless of accuracy does not encompass the complete definition of the term.