Variances in Sampling Streams of Coal

    Volume 11, Issue 5 (September 1983)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 7


    Rose, CD
    President, Coal Technology Consultants, Inc., Subsidiary of Hoff and Associates, Inc., Birmingham, AL

    Abstract

    Beginning with the postulate that the serial correlation in an infinite population is invariant with respect to segment mass, expressions are developed for variance as a function of mass and expected variance of the mean using random, stratified random, or systematic sampling of a linear population. The expression for variance as a function of mass is shown to agree well with data from one coal experiment and to be the same as an empirical formula developed from agricultural experiments.


    Paper ID: JTE10690J

    DOI: 10.1520/JTE10690J

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    Author
    Title Variances in Sampling Streams of Coal
    Symposium , 0000-00-00
    Committee D05