Within row pairwise comparisons in a two-way anova design
作者:
期刊:
Communications in Statistics - Simulation and Computation
(Taylor Available online 1987)
卷期:
Volume 16,
issue 4
页码: 939-955
ISSN:0361-0918
年代: 1987
DOI:10.1080/03610918708812629
出版商: Marcel Dekker, Inc.
关键词: disordinal interactions;multivariate t distribution;multivariate Studentized range;Games-Howell procedure;Dunnett's T3 and C;unequal variance
数据来源: Taylor
摘要:
The paper considers the problem of performing all pairwise comparisons of means ineach row of a two-way ANOVA. This problem arises in situations where an investigator is concerned about disordinal interactions. For the equal variance case the proposed procedure is based on an extension of Tukey's procedure. The new procedure requires percentage points of the “multivariate” Studentized range distribution, and a table of these percentage points is provided. For unequal variances, extensions of the Games and Howell (1976) technique as well as Dunnett's (1980) T3 and C procedures can be used. Simulation results suggest that these latter procedures perform in a manner similar to the situations studied by Dunnett. In particular, the extension of Dunnett's T3 procedure appears to be best, among the procedures studied, when the degrees of freedom areless than 50 for any treatment group. Otherwise, use the extension of Dunnetts C.
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