DIMACS TR: 2005-16

Extending Power and Sample Size Approaches for McNemar's Procedure to General Sign Tests

Author: Donald R. Hoover


Current software and textbooks present procedures to estimate power and sample size for sign tests that only apply to settings where positive (i.e., X=1) or negative (i.e., X=-1), but not neutral (i.e., X=0) outcomes occur. However, many studies analyzed by sign tests involve the more general setting where significant amounts of neutral outcomes can occur. This paper illustrates application of existing power / sample size approaches and software that have been developed for matched binary responses (McNemar's discordant pairs) to general sign tests with neutral outcomes occurring. An application is made to a recent study that the author collaborated on.

Key Words: McNemar's Procedure, Power, Sample Size, Sign Test

Paper Available at: ftp://dimacs.rutgers.edu/pub/dimacs/TechnicalReports/TechReports/2005/2005-16.pdf

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