Few statistical tests for proportions comparison

This article reviews a number of statistical tests for comparing proportions. These statistical tests are presented in a comprehensive way, so that OR practitioners can easily understand them and correctly use them. A test for 2 × 2 contingency tables is developed and shown to be more powerful than other classical tests of the literature such as Fisher’s exact test. Tables with critical values for small samples are provided, so that the test can be conducted without any computations.