In which measurement type is the measurement consistent but not necessarily accurate?

• A. Accuracy
• B. Precision
• C. Reliability
• D. Validity

Answer: (B)

The correct choice is precision. Precision refers to the consistency of measurements. It indicates how close multiple measurements of the same phenomenon are to one another, which reflects the degree of reproducibility.

For example, if a scientist uses a scale multiple times to measure the weight of the same object and consistently obtains the same reading, those measurements are considered precise, regardless of whether they match the true value of the object's weight. This means that while precision ensures that results are repeatable, it does not guarantee that they are accurate.

In comparison, accuracy pertains to how close a measurement is to the actual or true value. Reliability relates to the overall consistency of a measurement during repeated trials, and validity assesses whether a measurement truly reflects the concept it is intended to measure. Hence, precision focuses solely on consistent results without addressing their correctness relative to the true value.