Confidence Intervals for the Comparison of Two Proportions   

Juan Carlos Correa & Esperanza Sierra

 

Abstract           

The construction of confidence intervals to estimate π1-π2, the difference of two proportions, is an importante problem in applied work. We review different methods to construct them and we analyze their performance by a simulation study. Also we propose a index that allows us to compare these procedures, analyzing simultaneously the real confidence level and the length of them.

 

Key words: Estimation Binomial distribution, Confidence interval, Real confidence level, Coverage probability.

 

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