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This paper discusses some methods for test of a mean effect on biological direct assay on the basis of pooling of data. A need for such methods is emphasized in the experiments under a restriction of ...small sample size at two or several similar environments or conditions, especially on biological direct assay. The principle of pooling of data is based on a scheme of T. Kitagawa [1], B. E. B. Bennett [1] which discussed the estimation of a mean effect after preliminary test of significance. And recently H. Bozivich, T . A. Bancroft and H. D. Hartley [1] discussed the power of analysis of variance test according to the pooling scheme of data. In this paper the tests of means and percentages after the preliminary test of significance are discussed and a recommendation is given from the viewpoints of the size of the power and the power gain.続きを見る
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