2005•Encyclopedia of BiostatisticsRequires access
Sign Tests
E. Jacquelin Dietz
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Abstract
Abstract The sign test is a simple distribution‐free test that can be applied easily in a variety of situations. Observations, which may be difference scores, are replaced by their positive or negative signs and analyzed using a binomial test. The specific applications discussed here are a location test for the median, the Cox–Stuart test for tend, and the McNemar test for correlated proportions.