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Survival times of rats

In: Applied Statistics

Author

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  • E. J. Snell

    (Imperial College, Department of Mathematics)

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.

Suggested Citation

  • E. J. Snell, 1987. "Survival times of rats," Springer Books, in: Applied Statistics, chapter 0, pages 153-161, Springer.
    • Handle: RePEc:spr:sprchp:978-94-011-6946-2_28
    DOI: 10.1007/978-94-011-6946-2_28
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