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Confidence limits for the ratio of two rates based on likelihood scores: non-iterative method
P L Graham1, K Mengersen, A P Morton
1Statistics, School of Mathematical and Physical Sciences, University of Newcastle, Callaghan NSW 2308, Australia. pgraham@maths.newcastle.edu.au
Statistics in Medicine
|June 13, 2003
Abstract:
This paper describes a method for creating a confidence interval for the ratio of rates using the score statistic. This non-iterative and easy to apply procedure produces confidence intervals that are suitable for use with Poisson data and simulation results indicate that it is close to the nominal level for a wide range of scenarios.