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Coal Mechanization Sampling Precision
Author: technological excellence Date: 2019-11-28
In all sampling, sample preparation and testing methods, errors always exist. At the same time, the test results of any specified parameter using this method will also deviate from the true value of the parameter. It is impossible to determine the absolute bias of a single result on the "true value", but only to estimate the precision of the test result. The degree of agreement between the results of a series of measurements on the same coal is precision, and the degree of deviation of the average of the series of measurements from an acceptable reference value is bias (see GB / T 19494. 3)


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