BIASED AND RANDOM SAMPLING

THIS STUDY IS AN INVESTIGATION OF THE PRINCIPLE OF RANDOM SAMPLING INVOLVED IN DETERMINING PERCENT RELATIVE COMPACTION WHEN USING A STATISTICAL AREA CONCEPT METHOD. THE DATA WERE COLLECTED FROM THREE PROJECTS AND INDICATED THAT THERE IS NO DIFFERENCE BETWEEN THE AVERAGE RELATIVE COMPACTION OF AN AREA WHERE TEST SITES WERE SELECTED USING A RANDOM PLAN AND WITHOUT USING A RANDOM PLAN. ON A FOURTH PROJECT, DIFFERENCES WERE NOTED WHEN SITES WERE SELECTED IN A BIASED MANNER. IT WAS CONCLUDED THAT USE OF A MODIFIED RANDOM SAMPLING PLAN WAS DESIRABLE. A SYSTEM FOR USING A RANDOM SAMPLING PLAN IS PRESENTED. /CALDOT/

  • Supplemental Notes:
    • Contract F-1-5 1 APP
  • Corporate Authors:

    California Department of Transportation

    Transportation Laboratory
    5900 Folsom Boulevard
    Sacramento, CA  USA  95819
  • Authors:
    • Hatano, M M
    • Nolan, M
    • Hirsch, A D
    • Forsyth, R A
  • Publication Date: 0

Media Info

  • Features: Figures;
  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00228702
  • Record Type: Publication
  • Report/Paper Numbers: Final Rpt
  • Files: TRIS, STATEDOT
  • Created Date: Jun 5 1974 12:00AM