The Analysis of Experiments on Growth Rate

作者: F. B. Leech , M. J. R. Healy

DOI: 10.2307/2527604

关键词: Short durationMathematicsQuadratic equationStatisticsGrowth rateSeparate analysisWishart distributionGrowth curve (biology)General Biochemistry, Genetics and Molecular BiologyStatistics and ProbabilityGeneral Immunology and MicrobiologyApplied mathematicsGeneral Agricultural and Biological SciencesGeneral Medicine

摘要: comparable groups of growing subjects over a period time. The attribute interest to the experimenter-e.g., liveweight-is measured initially and at regular intervals during experimental period. results such an experiment are most commonly considered in terms average growth rate-e.g., gain liveweight per week-and this quantity is simply obtained by dividing difference initial final measurements duration experiment. Experiments type were discussed Wishart [1938, 1939]. He pointed out that method assessing rate ignored any information provided intermediate measurements, other features curve besides slope might merit consideration. Difficulties arise, however, because successive on same subject cannot be independent. accordingly suggested for each should broken down into its mean linear, quadratic, etc., components, these being subjected separate analysis. effects treatments could seen from analysis linear analyses further components would show what extent affecting shapes curves. In short duration, or when treatment small, summary solely will often adequate. When single compared with control, equivalent assuming effect-the between treated control subjects-increases linearly It natural estimate effect However, many types

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