13.3.2 Reproducibility—In comparing two mean values for the same material obtained by different operators using different equipment on different days, either in the samelaboratory or in different laboratories, the means should be judged not equivalent if they differ by more than the R value for that material.
13.3.3 Any judgment made in accordance with 13.3.1 and 13.3.2 would have an approximate 95 % (0.95) probability of being correct.
13.3.4 For further information, see Practice E 691. 13.4 Bias—The systematic error which contributes to the difference between a test result and a true (or reference) value.
There are no recognized standards on which to base an estimate of bias for these test methods.