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New Zealand Statistics Conference
September 1, 2000
University of Canterbury
Christchurch, New Zealand

Organizers
Dr Marco Reale, Prof Malcolm Faddy, Dr Irene Hudson, Doris Barnard, Julian Visch

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Korn and Graubard confidence intervals for proportions
by
Alistair Gray
Statistical Development Group, Statistics New Zealand

Korn and Graubard have suggested a method for producing confidence intervals for proportions (either for very small proportions or proportions estimated from small sample sizes) where the sample is based on a complex sample design. This method uses the exact binomial confidence intervals but with the sample size modifed by the estimated design effect for that proportion. Statistics New Zealand wanted to use this method for the 1999 Gaming survey and carried out a bootstrap analysis to see whether the coverage properties of such intervals were satisfactory. This talk presents the results of this analysis.

Date received: August 16, 2000

Copyright © 2000 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cadt-19.