Detecting active effects in unreplicated designs |
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Authors: | P. Angelopoulos C. Koukouvinos |
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Affiliation: | a Department of Mathematics, National Technical University of Athens, Athens, Greece |
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Abstract: | Unreplicated factorial designs pose a difficult problem in analysis because there are no degrees of freedom left to estimate the error. Daniel [Technometrics 1 (1959), pp. 311-341] proposed an ingenious graphical method that does not require σ to be estimated. Here we try to put Daniel's method into a formal framework and lift the subjectiveness that carries. A simulation study has been conducted that shows that the proposed method behaves better than Lenth's [Technometrics 31 (1989), pp. 469-473] popular method. |
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Keywords: | unreplicated design factorial effect outliers |
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