FDR- and FWE-controlling methods using data-driven weights |
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Authors: | Livio Finos Luigi Salmaso |
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Affiliation: | 1. Center for Modelling Computing and Statistics, University of Ferrara, via N. Machiavelli 35, 44100 Ferrara, Italy;2. Department of Management and Engineering, University of Padova, Str. S. Nicola 3, 36100 Vicenza, Italy |
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Abstract: | Weighted methods are an important feature of multiplicity control methods. The weights must usually be chosen a priori, on the basis of experimental hypotheses. Under some conditions, however, they can be chosen making use of information from the data (therefore a posteriori) while maintaining multiplicity control. In this paper we provide: (1) a review of weighted methods for familywise type I error rate (FWE) (both parametric and nonparametric) and false discovery rate (FDR) control; (2) a review of data-driven weighted methods for FWE control; (3) a new proposal for weighted FDR control (data-driven weights) under independence among variables; (4) under any type of dependence; (5) a simulation study that assesses the performance of procedure of point 4 under various conditions. |
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Keywords: | A priori ordered hypotheses FDR FWE Multiplicity control Weighted procedures |
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