"This digest summarizes key findings obtained in 2009 and 2010 from continuing NCHRP Project 9-26A, "Data Mining and Interlaboratory Studies to Prepare Precision Statements for AASHTO Standard Test Methods." Project 9-26A was conducted by the AASHTO Materials Reference Laboratory under the direction of the principal investigator, Haleh Azari. This digest is based on the contractor's task reports, which are available online as NCHRP Web-Only Documents 163 through 166."

"This digest summarizes key findings obtained between January 2007 and June 2009 under continuing NCHRP Project 9-26A, "Data Mining and Interlaboratory Studies to Prepare Precision Statements for AASHTO Standard Test Methods." NCHRP Project 9-26A was conducted by the AASHTO Materials Reference Laboratory under the direction of the Principal Investigator, Dr. Haleh Azari. This digest is based on task reports co-authored by Dr. Azari ... [et al.] ; these task reports are available online as NCHRP Web-Only Documents 139, 140, 141, and 142."

This digest summarizes key findings obtained between January 2007 and June 2009 under continuing NCHRP Project 9-26A, "Data mining and interlaboratory studies to prepare precision statements for AASHTO standard test methods."