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Sign Tests


  1. Obaid M. Al-saidy

Published Online: 15 SEP 2006

DOI: 10.1002/9780470057339.vas022

Encyclopedia of Environmetrics

Encyclopedia of Environmetrics

How to Cite

Al-saidy, O. M. 2006. Sign Tests. Encyclopedia of Environmetrics. 5.

Author Information

  1. Qaboos University, Oman

Publication History

  1. Published Online: 15 SEP 2006


The sign test is the oldest form of the distribution free tests, first introduced by Arbuthnot in 1710. Aside from its well-established status, the sign test is easy to carry out and is applicable in a variety of situations. This article discusses the ordinary sign test for the median based on a single sample and on paired samples, and the Cox–Stuart sign test for detecting monotonic trend.