Survival times of rats

E. J. Snell
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E. J. Snell: Imperial College, Department of Mathematics

Chapter Set 3 in Applied Statistics, 1987, pp 153-161 from Springer

Abstract: Abstract Table S.3 (J.S. Maritz, personal communication) gives data from an experiment on carcinogenesis in rats. Eighty rats were divided at random into 4 groups of 20 rats each, and treated as follows: Group I D,no I,no P; II D, I,noP; III D,no I, P; IV D, I, P; where D is thought to produce cancer, I is thought to act as an inhibitor and P is thought to accelerate the appearance of cancer. The data in Table S.3 are survival times in days; after 192 days the experiment was ended, and a post mortem was conducted on every surviving rat to assess the presence or absence of cancer. In the table, 192- means that the rat survived 192 days but was found to have cancer. The superscript + means death from a cause unrelated to cancer; in particular, 192+ means that on post mortem the rat did not have cancer.

Date: 1987
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DOI: 10.1007/978-94-011-6946-2_28

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