Ropa a ropné výrobky - Preciznost metod a výsledků měření - Část 5: Statistické hodnocení shody mezi dvěma metodami měření pro stejnou vlastnost (Norma k přímému použití jako ČSN).
NORMA vydána dne 1.7.2024
Designation standards: ČSN EN ISO 4259-5
Classification mark: 656003
Catalog number: 519263
Publication date standards: 1.7.2024
The number of pages: 64
Approximate weight : 192 g (0.42 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN
This document specifies statistical methodology for assessing the expected agreement between two test methods that purport to measure the same property of a material, and for deciding if a simple linear bias correction can further improve the expected agreement.
This document is applicable for analytical methods which measure quantitative properties of petroleum or petroleum products resulting from a multi-sample-multi-lab study (MSMLS). These types of studies include but are not limited to interlaboratory studies (ILS) meeting the requirements of ISO 4259-1 or equivalent, and proficiency testing programmes (PTP) meeting the requirements of ISO 4259-3 or equivalent.
The methodology specified in this document establishes the limiting value for the difference between two results where each result is obtained by a different operator using different apparatus and two methods X and Y, respectively, on identical material. One of the methods (X or Y) has been appropriately bias-corrected to agree with the other in accordance with this practice. This limit is designated as the between-methods reproducibility. This value is expected to be exceeded with a probability of 5 % under the correct and normal operation of both test methods due to random variation