Standard Recommended Practice for
Statlstlcal Procedures
AASHTO Designation: R 4-97 (2005)
SCOPE
1.1.This recommended practice is to provide guidance in the use and application of statistical procedures in the precision analysis of sampling, testing, and acceptance of construction materials.
GENERAL PROVISIONS
2.1.It is recommended that AASHTO specifications for materials and for sampling and testing incorporate accepted statistical standard procedures.
The following ASTM designations provide guidance in this area and their latest published revisions are adopted as a recommended practice for the development of
AASHTO standards.
ASTM C 670, Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
ASTM C 802, Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction Materials
ASTM D 2915, Standard Practice for Evaluating Allowable Properties for Grades of Structural Lumber
ASTM D 3665, Standard Practice for Random Sampling of Construction Materials
ASTM D 4460, Standard Practice for Calculating Precision Limits Where Values are Calculated from Other Test Methods
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