31 Pages Posted: 18 Oct 2007
Date Written: July 5, 2007
This Monte-Carlo study investigates sensitivity of the Wilcoxon signed rank test to certain assumption violations in small samples. Emphasis is put on within-sample-dependence, between-sample dependence, and the presence of ties. Our results show that both assumption violations induce severe size distortions and entail power losses. Surprisingly, these consequences do vary substantially with other properties the data may display. Results provided are particularly relevant for experimental settings where ties and within-sample dependence are frequently observed.
Keywords: Wilcoxon signed rank test, ties, dependent observations, size and power
JEL Classification: C12, C14, C15
Suggested Citation: Suggested Citation
Chlass, Nadine and Krüger, Jens J., Small Sample Properties of the Wilcoxon Signed Rank Test with Discontinuous and Dependent Observations (July 5, 2007). Jena Economic Research Paper No. 2007-032. Available at SSRN: https://ssrn.com/abstract=1021169 or http://dx.doi.org/10.2139/ssrn.1021169