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  • The aim of this paper is to describe an alternative method of estimation of severities in risk assessment through the t-score moment method when the data are contaminated. The method is a bit less efficient than the standard maximum likelihood method, however it is more robust. Simulation study emphasize the fact that crucial role is played by level of contamination. In cases of very small contamination, both methods give similar results. The larger contamination, the better are the t-moment estimates. The reason for it is the bounded t-score of heavy-tailed distributions (and, consequently, bounded influence functions of the estimators).
  • The aim of this paper is to describe an alternative method of estimation of severities in risk assessment through the t-score moment method when the data are contaminated. The method is a bit less efficient than the standard maximum likelihood method, however it is more robust. Simulation study emphasize the fact that crucial role is played by level of contamination. In cases of very small contamination, both methods give similar results. The larger contamination, the better are the t-moment estimates. The reason for it is the bounded t-score of heavy-tailed distributions (and, consequently, bounded influence functions of the estimators). (en)
  • Je popsána alternativní metoda odhadu pojistného rizika při kontaminovaných datech. Metoda odhadů pomocí momentů t-skórů je sice méně efektivní než metoda maximální věrohodnosti, ale je robustnější. Ze simulační studie vyplývá, že podstatnou roli hraje míra kontaminace. Pro malou kontaminaci dávají obě metody podobné výsledky, čím je však kontaminace vyšší, tím lépe pracuje nova metoda. Důvodem je, že t-skóry rozdělení s těžkými chvosty jsou (a stejně tak jejich momenty) omezené. (cs)
Title
  • A Note on Favorable Estimation when Data is Contaminated
  • Poznámka k odhadům vhodným pro kontaminovaná data (cs)
  • A Note on Favorable Estimation when Data is Contaminated (en)
skos:prefLabel
  • A Note on Favorable Estimation when Data is Contaminated
  • Poznámka k odhadům vhodným pro kontaminovaná data (cs)
  • A Note on Favorable Estimation when Data is Contaminated (en)
skos:notation
  • RIV/67985807:_____/08:00322077!RIV09-AV0-67985807
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(AV0Z10300504)
http://linked.open...iv/cisloPeriodika
  • 4
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 354343
http://linked.open...ai/riv/idVysledku
  • RIV/67985807:_____/08:00322077
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • t-score; contamination; heavy-tailed distributions (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • CS - Státní svaz Srbska a Černé Hory
http://linked.open...ontrolniKodProRIV
  • [A80FDCB1C0C6]
http://linked.open...i/riv/nazevZdroje
  • Communications in Dependability and Quality Management
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 11
http://linked.open...iv/tvurceVysledku
  • Fabián, Zdeněk
  • Stehlík, M.
http://linked.open...n/vavai/riv/zamer
issn
  • 1450-7196
number of pages
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