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Science / Chemistry / Accuracy: Compare with precision and trueness. Accuracy is the correctness of a single measurement. The accuracy of a measurement is assessed by comparing the measurement with the true or accepted value, based on evidence independent of the measurement. The closeness of an average to a true value is referred to as 'trueness'.
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Accuracy Noun Synonyms: exactness, correctness, precision, preciseness
Science / Chemistry / Precision: Precision is reproducibility. Saying 'These measurements are precise' is the same as saying, 'The same measurement was repeated several times, and the measurements were all very close to one another'. MORE