sison5 swMATH ID: 26365 Software Authors: Warren May; William Johnson Description: Constructing two-sided simultaneous confidence intervals for multinomial proportions for small counts in a large number of cells. Confidence intervals for multinomial proportions are often constructed using large-sample methods that rely on expected cell counts of 5 or greater. In situations that give rise to a large number of categories, the cell counts may not be of adequate size to ensure the appropriate overall coverage probability and alternative methods of construction have been proposed. Sison and Glaz (1995) developed a method of constructing two-sided confidence intervals for multinomial proportions that is based on the doubly truncated Poisson distribution and their method performs well when the cell counts are fairly equally dispersed over a large number of categories. In fact, the Sison and Glaz (1995) intervals appear to outperform other methods of simultaneous construction in terms of coverage probabilities and interval length in these situations. To make the method available to researchers, we have developed a SAS macro to construct the intervals proposed by Sison and Glaz (1995). Homepage: https://www.jstatsoft.org/v005/i06 Keywords: Confidence intervals; multinomial proportions; Sison and Glaz; SAS; SAS macro; Journal of Statistical Software Related Software: MultinomialCI; SAS/IML; SAS; ctmcd; bootstrap; msm; R Cited in: 2 Publications Standard Articles 1 Publication describing the Software Year Cited by 5 Authors 1 Fischer, Matthias 1 Glaz, Joseph 1 Möstel, Linda 1 Pfeuffer, Marius 1 Sison, Cristina P. Cited in 2 Serials 1 Journal of the American Statistical Association 1 Computational Statistics Cited in 3 Fields 2 Statistics (62-XX) 1 Numerical analysis (65-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) Citations by Year