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Activity Number:
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428
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Type:
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Contributed
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Date/Time:
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Wednesday, August 9, 2006 : 10:30 AM to 12:20 PM
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Sponsor:
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General Methodology
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| Abstract - #307206 |
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Title:
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Stepwise Permutation Tests Using Medians
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Author(s):
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Scott Richter*+ and Melinda McCann
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Companies:
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The University of North Carolina at Greensboro and Oklahoma State University
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Address:
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1000 Spring Garden Street, GREENSBORO, NC, 27402,
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Keywords:
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simultaneous inference ; pairwise comparisons ; median difference ; permutation test
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Abstract:
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Richter & McCann (2005) presented a single step median-based multiple comparison procedure for assessing evidence of group location differences. The sampling distribution was based on the permutation distribution of the maximum median difference among all pairs, and provides strong control of the FWE. We extend this idea to develop a stepwise procedure for comparing group location. We show that the stepwise procedure provides greater power for detecting group location differences while still maintaining strong FWE control.
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