Abstract
A RECENT paper by Emik1 demonstrates a method of dealing with counts of trichostrongylid eggs in the fæces of sheep. The method given is fundamentally wrong and in fact makes the paper so misleading that it seems worth outlining a more appropriate statistical treatment. The data were accumulated in a survey of the worm-egg numbers in the fæces of the lamb flock at the University of California. Trichostrongylid eggs were counted in fæces samples by a technique modified from that of Caldwell. Samples were taken once a week for twelve weeks and duplicate dilutions examined.
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References
Emik, L. O., J. Animal Sci., 8, 73–80 (1949).
McQuillan, M. T., Trikojus, V. M., Campbell, A. D., and Turner, A. W., Brit. J. Exp. Path., 29, 93 (1948).
Swanson, R. G., and Knodt, C. B., J. Dairy Sci., 32, 257 (1949).
Anscombe, F. J., J. Roy. Stat. Soc., 111, 181 (1948).
Cochran, W. G., J. Roy. Stat. Soc., Supp., 6, 104 (1939).
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LEECH, F. Statistical Analysis of Results for Successive Tests on the Same Organism. Nature 165, 323–324 (1950). https://doi.org/10.1038/165323b0
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DOI: https://doi.org/10.1038/165323b0
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