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    A Physical Interpretation of Coal Sampling Variances with Application to Sample Reduction

    Published: 01 January 1959

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    A physical interpretation may be applied to the statistical variances calculated from coal sampling data by relating one of them to a randomly mixed portion of the coal, and the other to a segregated portion. Use of general weightconsist relations makes it possible to extend this interpretation to sample reduction. The importance of assuring a sufficient degree of mixing in the gross sample is discussed and emphasized.

    Author Information:

    Landry, BA
    Assistant Technical Director, Battelle Memorial Institute, Columbus, Ohio

    Committee/Subcommittee: E11.02

    DOI: 10.1520/STP39487S