ASTM D4467-94(2001)
Standard Practice for Interlaboratory Testing of a Textile Test Method That Produces Non-Normally Distributed Data

Standard No.

ASTM D4467-94(2001)

Release Date

1994

Published By

American Society for Testing and Materials (ASTM)

Status

Withdraw 2010-02

Latest

ASTM D4467-94(2001)

Scope

1.1 This practice covers design and analysis of interlaboratory testing of a test procedure in the case where the resulting test data are discrete variates or are continuous variates not normally distributed. This practice applies to all such interlaboratory tests used to validate a test procedure.

1.2 Analysis of interlaboratory test results permits validation that the process of using the test method is in statistical control and provides the information required to write statements on precision and bias as directed in Practice D2906. It also gives the information for determining the number of specimens per unit in the laboratory sample as required in Practice D2905.

1.3 Precision statements for non-normally distributed data can be written as a function of the level of the property of interest without an interlaboratory test if the underlying distribution is known and statistical control can be assumed.

1.4 If the underlying distribution is unknown, the precision of the test method can only be approximated. There are no generally accepted methods of making approximations of this sort.

1.5 If statistical control cannot be assumed, then a meaningful precision statement cannot be written and the test method should not be used.

1.6 This practice is intended for use with data from test methods that cannot be properly modeled by a normal distribution. See Practices D2904 and E691 for applications that can be modeled by a normal distribution.

1.7 This practice includes the following sections:

	Sections
Scope	1
Referenced Documents	2
Terminology	3
Significance and Uses	4
General Considerations	5
Basic Statistical Design	6
Pilot-Scale Interlaboratory Test	7
Full-Scale Interlaboratory Test	8
Missing Data	9
Outlying Observations	10
Interpretation of Data	11
Plotting Results	12
Keywords	13
Pilot-Scale and Full-Scale Interlaboratory Tests	Annex A1
Calculation of Chi-Square	Annex A2

1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ASTM D4467-94(2001) Referenced Document

• ASTM D123 Standard Terminology Relating to Textiles*， 2023-09-14 Update
• ASTM D2904 Standard Practice for Interlaboratory Testing of a Textile Test Method that Produces Normally Distributed Data *， 1997-04-19 Update
• ASTM D2905 Standard Practice for Statements on Number of Specimens for Textiles *， 1997-04-19 Update
• ASTM D2906 Standard Practice for Statements on Precision and Bias for Textiles *， 1997-04-19 Update
• ASTM D4646 Standard Test Method for 24-h Batch-Type Measurement of Contaminant Sorption by Soils and Sediments
• ASTM D4853 Standard Guide for Reducing Test Variability *， 1997-04-19 Update
• ASTM E1169 Standard Guide for Conducting Ruggedness Tests
• ASTM E456 Standard Terminology for Relating to Quality and Statistics*， 1996-04-19 Update
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method*， 1999-04-19 Update

ASTM D4467-94(2001) history

• 1994 ASTM D4467-94(2001) Standard Practice for Interlaboratory Testing of a Textile Test Method That Produces Non-Normally Distributed Data
• 2001 ASTM D4467-94 Standard Practice for Interlaboratory Testing of a Textile Test Method That Produces Non-Normally Distributed Data