How is accuracy best defined in measurement terms?

Accuracy in measurement terminology refers to how close a measured value is to the actual true value or a reference standard. When a measurement shows a high degree of accuracy, it indicates that the results obtained closely align with what is considered the correct or accepted value. This alignment is crucial, particularly in fields like science, engineering, and trade, where precise measurements can have significant implications.

The ability to obtain the same answer when compared to a reference standard underscores the concept of accuracy. It emphasizes the comparison against a known value, highlighting the goal of achieving minimal error in measurements. Accurate measurements are essential for reliable data analysis and decision-making processes.

While the other options address different aspects of measurement—such as variability, ranges, and averages—none encapsulate the essence of accuracy as effectively as the ability to correspond closely to a reference standard.