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Negativni binomski model : magistrsko delo
ID Neveda, Jan (Author), ID Bernik, Janez (Mentor) More about this mentor... This link opens in a new window

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Abstract
Na začetku tega dela so opisane glavne značilnosti dveh porazdelitev, ki se najpogosteje uporabljata pri napovedovanju števila škodnih zahtevkov. To sta negativna binomska porazdelitev in Poissonova porazdelitev. Uvodni predstavitvi sledi analiza Kolmogorov-Smirnovega testa, s katerim preverimo, ali je določen vzorec porazdeljen negativno binomsko. Pri tem se uporabi poseben algoritem, ki se imenuje Freyev algoritem. Celoten algoritem je stestiran na določenih podatkih, opremljen pa je tudi s psevdokodo, ki je napisana v programu R. V nadaljevanju sta nato predstavljeni metoda momentov in metoda največjega verjetja, ki ju uporabimo pri ocenjevanju parametrov neznane porazdelitve. Na koncu četrtega poglavja spoznamo še hi-kvadrat test, s katerim preverimo pravilnost ocenjenih parametrov in navsezadnje tudi kvaliteto aproksimacije. V zaključku dela pa je na zavarovalniških podatkih predstavljen postopek napovedovanja pričakovanega števila škod, s pomočjo negativnega binomskega modela.

Language:Slovenian
Keywords:Zavarovalnica, škodni dogodek, Kolmogorov-Smirnov test, Freyev algoritem, negativna binomska porazdelitev, hi-kvadrat test
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FMF - Faculty of Mathematics and Physics
Year:2018
PID:20.500.12556/RUL-103999 This link opens in a new window
UDC:519.2
COBISS.SI-ID:18459481 This link opens in a new window
Publication date in RUL:30.09.2018
Views:2241
Downloads:387
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Secondary language

Language:English
Title:Negative binomial model
Abstract:
At the beginning main features of negative binomial and Poisson distribution are described, which are mainly used for modelling claim frequency. In order to test, if some data is distributed negative binomial, Kolmogorov-Smirnov test is introduced in chapter 4.1. For the calculation of p-value Frey algorithm is used on some data and pseudocode written in program R is presented. Two other methods are then defined in chapter 4.2, which are mainly used in practice to estimate parameters of some distribution. These are method of moment and method of maximum likelihood estimation. In the next chapter, quality of approximation is tested with chi-squared test. At the end, negative binomial model is used to predict claim frequency of some actuarial data.

Keywords:Insurance company, claim, Kolmogorov-Smirnov test, Frey algorithm, negative binomial distribution, chi-squared test

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