9. Precision and Bias
9.1 The following criteria should be used for judging the acceptability of results (95 % confidence):
9.1.1 Repeatability - The difference between two test results, obtained by the same operator with the same apparatus under constant operating conditions on identical test material, would in the long run, in the normal and correct operation of the test method, exceed the following values only in one case in twenty:
9.1.2 Reproducibility - The difference between two single and independent results obtained by different operators working in different laboratories on identical test material would, in the long run, in the normal and correct operation of the test method, exceed the following values only in one case in twenty:
NOTE 1 - Precision limits have not been established for values above 15 peroxide number.
9.2 Bias - The procedure in this test method has no bias because the value of peroxide number can be defined only in terms of a test method.
10. Keywords
10.1 petroleum number; petroleum wax; wax