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자연과학대학
통계학전공
Journal papers
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Testing for one-sided group effects in repeated measures study
Title
Testing for one-sided group effects in repeated measures study
Authors
Shin D.W.
;
Park C.G.
;
Park T.
Ewha Authors
신동완
SCOPUS Author ID
신동완
Issue Date
2001
Journal Title
Computational Statistics and Data Analysis
ISSN
0167-9473
Citation
Computational Statistics and Data Analysis vol. 37, no. 2, pp. 233 - 247
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
In repeated measures experiments, one-sided tests for group effects are developed using the likelihood ratio principle. The constrained maximum likelihood estimators under hypotheses of one-sided group effects are approximated by projecting unconstrained maximum likelihood estimators onto the first-quadrant. From these constrained maximum likelihood estimators, likelihood ratio tests are constructed. The limiting null distributions of the proposed test statistics are shown to be chi-bar square distributions. A simulation study shows that the proposed tests have improved power over the usual chi-square statistics for testing group effects. Two real data sets are analyzed to illustrate the proposed statistics. © 2001 Elsevier Science B.V. All rights reserved.
DOI
10.1016/S0167-9473(01)00008-1
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