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ASTM C670-13
Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
Automaticky přeložený název:
Standardní praxe pro přípravu přesnost a zkreslení prohlášení pro zkušební metody pro stavební materiály
NORMA vydána dne 1.7.2013
Informace o normě:
Označení normy: ASTM C670-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.7.2013
Kód zboží: NS-14549
Počet stran: 10
Přibližná hmotnost: 30 g (0.07 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Anotace textu normy ASTM C670-13 :
Keywords:
acceptable range, bias, coefficient of variation, difference limit, multilaboratory precision, single-operator precision, standard deviation, test determination, test result, ICS Number Code 91.100.01 (Construction materials)
Doplňující informace
| 1. Scope | ||||||||||||
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1.1 The Form and Style for ASTM Standards requires that all test methods contain statements on precision and bias. Further, the precision statement is required to contain a statement on single-operator precision (repeatability) and a statement on multilaboratory precision (reproducibility). This practice provides guidance for preparing precision and bias statements that comply with these requirements. Discussion of the purpose and significance of precision and bias statements for users of test methods is also provided. Examples of precision statements that conform to this practice are included in Appendix X1. This practice supplements Practice E177 and has been developed to meet the needs of ASTM Committees dealing with construction materials. 1.2 This practice assumes that an
interlaboratory study (ILS) has been completed in accordance with
Practice C802 or Practice E691. The interlaboratory study provides
the necessary statistical values to write the precision and bias
statements.
1.3 The system of units for this practice is not specified. Dimensional quantities in the practice are presented only in examples of precision and bias statements. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||||||
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