Accuracy
Definition
The degree to which a measured value agrees with the accepted true or reference value of the quantity. A biased instrument can produce precise but inaccurate results. Accuracy is assessed using certified reference materials or standards with known values.
Related terms
- Between-class variability
- The spread of measurements between items from different sources or categories. A forensic method is most discriminating when between-class variability is large...
- Measurement error
- The discrepancy between a recorded value and the true value of the property being measured. Arises from instrument calibration limits, analyst technique,...
- Precision
- The degree to which repeated measurements of the same specimen under the same conditions agree with each other. Quantified by the standard...
- Repeatability
- The agreement between successive measurements of the same specimen made by the same analyst, on the same instrument, in the same laboratory,...
- Within-class variability
- The natural spread of measurements among items that share a common source, class, or category. For example, the range of refractive index...
Explained in
- Variability and Measurement ErrorThe degree to which a measured value agrees with the accepted true or reference value of the quantity. A biased instrument can produce precise but inaccurate r...