ISO13909-2016 Hard coal and coke -- Mechanical sampling is an international standard participation in revised by Standardization Administration of the People's Republic of China (SAC) and CKIC, which is officially released in July 1st, 2016.
SAC is the participating members of International Organization of Standardization of...
1. Precision and Accuracy
Precision refers to consistency in the independent test results under prescribed conditions.
Accuracy refers to the consistency between the test result and the measured true value or the conventional truth value.
The figure below clearly shows the relationship between p...