Use of historical controls for animal experiments.

Environ Health Perspect · 1985 · PMC1568499 · PMID 4076086

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an increasing trendno p-value reported

The statistical test of hypothesis of an increasing trend in proportions is given by 218 HISTORICAL CONTROLS FROM ANIMAL EXPERIMENTS Ho: k=O vs.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.