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Abstract Details
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Activity Number:
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191
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Type:
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Contributed
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Date/Time:
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Monday, July 30, 2012 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Statistical Consulting
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| Abstract - #306169 |
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Title:
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Using the Tukey-Kramer Omnibus Test in the Hayter-Fisher Procedure
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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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107 Petty Building, Greensboro, NC, 27402, United States
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Keywords:
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Tukey-Kramer ;
Hayer-Fisher ;
multiple pairwise comparisons
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Abstract:
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Using Tukey-Kramer versus the ANOVA F-test as the omnibus test of the Hayter-Fisher procedure for comparing all pairs of normally distributed means, when sample sizes are unequal, is investigated. Simulation results suggest that using Tukey-Kramer leads to as much or more any-pairs power than using the F-test for certain patterns of mean differences, and equivalent per-pair and all-pairs power for all cases. Further, using Tukey-Kramer results in a consonant test procedure, where there cannot be disagreement between the results of the omnibus test and the subsequent pairwise tests. The results suggest that when sample sizes are unequal, Tukey-Kramer may be preferred over the F-test as the omnibus test for the Hayter-Fisher procedure.
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