Testing Marginal Homogeneity for Ordinal Categorical Variables

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected].. International Biometric Society is collaborating with JSTOR to digitize, preserve and extend access to Biometrics. SUMMARY The standard chi square tests of marginal homogeneity take no account of possible category ordering. We describe several strategies that make use of category order and which tend to yield more powerful tests for certain common alternatives.