Accession Number : ADA018710

Title :   A Nonrandomized Unconditional Test for Comparing Two Proportions.

Descriptive Note : Technical rept.,


Personal Author(s) : McDonald,Lyman L. ; Davis,Bruce ; Milliken,George A.

Report Date : OCT 1975

Pagination or Media Count : 67

Abstract : It is shown that the 'usual' nonrandomized, conditional test for comparing proportions using independent binomial samples, is very conservative in the sense that the actual significance level attributable to an outcome is often one-fourth to one-half of the anticipated value. A nonrandomized unconditional test is proposed, and for sample sizes up to 20, tables are given which specify one-sided critical regions of size less than or equal to the nominal values 0.10, 0.05, 0.025, 0.01, and 0.005 (two-sided critical regions are also given). Numerical examples illustrating the use of the tables are included.

Descriptors :   *Sampling, *Distribution functions, *Statistical tests, Stochastic processes, Hypergeometric functions, Tables(Data), Comparison

Subject Categories : Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE