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Win-probabilities for comparing two Poisson variables

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  • A. J. Hayter

Abstract

This article considers the problem of choosing between two possible treatments which are each modeled with a Poisson distribution. Win-probabilities are defined as the probabilities that a single potential future observation from one of the treatments will be better than, or at least as good as, a potential future observation from the other treatment. Using historical data from the two treatments, it is shown how estimates and confidence intervals can be constructed for the win-probabilities. Extensions to situations with three or more treatments are also discussed. Some examples and illustrations are provided, and the relationship between this methodology and standard inference procedures on the Poisson parameters is discussed.

Suggested Citation

  • A. J. Hayter, 2016. "Win-probabilities for comparing two Poisson variables," Communications in Statistics - Theory and Methods, Taylor & Francis Journals, vol. 45(20), pages 5966-5976, October.
    • Handle: RePEc:taf:lstaxx:v:45:y:2016:i:20:p:5966-5976
    DOI: 10.1080/03610926.2014.953693
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