Yazar "Şenoğlu, Birdal" için listeleme
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Alpha-skew generalized t distribution [Distribución t generalizada alfa sesgada]
Acıtaş, Şükrü; Şenoğlu, Birdal; Arslan, Olcay (Universidad Nacional de Colombia, 2015)The alpha-skew normal (ASN) distribution has been proposed recently in the literature by using standard normal distribution and a skewing approach. Although ASN distribution is able to model both skew and bimodal data, it ... -
A comparative study for the location and scale parameters of the Weibull distribution with given shape parameter
Mert Kantar, Yeliz; Şenoğlu, Birdal (Pergamon-Elsevier Science LTD, 2008)Nine parametric estimators of the location and scale parameters of a two-parameter Weibull distribution are compared in terms of their bias and efficiency in a simulation study. The estimators considered are the maximum ... -
Comparison of certain value-at-risk estimation methods for the two-parameter Weibull loss distribution
Gebizlioğlu, Ömer L.; Şenoğlu, Birdal; Mert Kantar, Yeliz (Elsevier Science BV, 2011)The Weibull distribution is one of the most important distributions that is utilized as a probability model for loss amounts in connection with actuarial and financial risk management problems. This paper considers the ... -
En Küçük Kareler Kestiricilerinin Etkinliklerinin Normal Olmayan Bazı Dağılımlar İçin İncelenmesi
Şenoğlu, Birdal; Özarıcı, Özlem; Fidan, Hatice (Anadolu Üniversitesi, 2001)Bu çalışmanın temel amacı uygulamada yaygın olarak kullanılan En Küçük Kareler (EKK) Kesimcilerinin Normal dağılım dışındaki dağılımlar için etkin kestiriciler olmadığının gösterilmesidir. Özellikle normal olmayan simetrik ... -
Estimating the location and scale parameters of the Weibull distribution: An application from engineering
Mert Kantar, Yeliz; Şenoğlu, Birdal (Acta Press Anaheim, 2007)There exist various methods for estimating the location and scale parameters of the Weibull distribution. The maximum likelihood estimators (MLE), moment estimators (ME), generalized spacing estimators (GSE), modified ... -
Generalized Lindley and Power Lindley distributions for modeling the wind speed data
Arslan, Talha; Acıtaş, Şükrü; Şenoğlu, Birdal (Pergamon-Elsevier Science LTD, 2017)In this study, we propose to use Generalized Lindley (GL) and Power Lindley (PL) distributions as an alternative to the Weibull distribution for modeling the wind speed data. In the application part of the study, we consider ... -
Inferences on stress-strength reliability based on ranked set sampling data in case of Lindley distribution
Akgül, Fatma Gül; Acıtaş, Şükrü; Şenoğlu, Birdal (Taylor & Francis LTD, 2018)In this study, we consider point and interval estimation of stress-strength reliability R = P(X < Y) based on ranked set sampling when the distribution of the stress and the strength are both Lindley. Firstly, maximum ... -
Interval estimation of the system reliability for Weibull distribution based on ranked set sampling data
Akgül, Fatma Gül; Şenoğlu, Birdal; Acıtaş, Şükrü (Hacettepe University, Fac Sci, 2018)Inference for the system reliability R is one of the most popular problems in the areas of engineering, statistics, biostatistics and etc. Therefore, there exist considerable numbers of studies concerning this problem. ... -
İki-fazlı doğrusal regresyon modelinde değişim noktasının dayanıklı tahmini
Acıtaş, Şükrü (Anadolu Üniversitesi, 2014)Bu tez çalışmasında, iki-fazlı doğrusal regresyon modelinde değişim noktasının tahmini ele alınmıştır. İki-fazlı doğrusal regresyon modelindeki hata terimlerinin dağılımının uzun kuyruklu simetrik (long-tailed symmetric–LTS), ... -
A new approach for estimating the parameters of Weibull distribution via particle swarm optimization: An application to the strengths of glass fibre Cheek tor data
Acıtaş, Şükrü; Aladağ, Çağdaş Hakan; Şenoğlu, Birdal (Elsevier Sci LTD, 2019)Three-parameter Weibull is one of the most popular and most widely-used distribution in many fields of science. Therefore, many studies have been conducted concerning the statistical inferences of the parameters of Weibull ... -
Obesity and Body Image of Women and Men in Iran-Tabriz
Shahvırdı, Leila; Gültekin, Timur; Aghdam, Mohammed Bagher Alızadeh; Acıtaş, Şükrü; Şenoğlu, Birdal (2019)The aim of this research is to determine the rates of obesity in men and women in Iran Tabriz and to reveal the relationship between obesity and body sensation. Within the scope of this aim, height, weight and Body Mass ... -
One-step M-estimators: Jones and Faddy's skewed t-distribution
Acıtaş, Şükrü; Kasap, Pelin; Şenoğlu, Birdal; Arslan, Olcay (Taylor & Francis LTD, 2013)One-step M (OSM)-estimator needs some initial/preliminary estimates at the beginning of the calculation process. In this study, we propose to use new initial estimates for the calculation of the OSM-estimator. We consider ... -
Ortak değişkenlerin varlığı durumunda faktöriyel tasarımlar
Acıtaş, Şükrü (Anadolu Üniversitesi, 2010)Bu calışmada ortak değişkene sahip faktöriyel tasarımlar ele alınmıştır. Bu tasarımlar için klasik teori, normallik varsayımına dayalı elde edilir. Buna karşın, hata terimleri normal dağılıma sahip değilse model parametrelerinin ... -
Ridge-Type MML Estimator in the Linear Regression Model
Acıtaş, Şükrü; Şenoğlu, Birdal (Springer International Publishing Ag, 2019)Ridge regression is widely used to deal with the multicollinearity problem. However, traditional ridge estimator (Hoerl and Kennard 1970) loses its efficiency in the presence of outliers, since it is obtained based on least ... -
ROBUST 2(k) FACTORIAL DESIGNS: NON-NORMAL SYMMETRIC DISTRIBUTIONS
Şenoğlu, Birdal; Acıtaş, Şükrü; Kasap, Pelin (Isoss Publ, 2012)Senoglu (2005, 2007a) considered the estimation and hypothesis testing procedures for the 2(k) factorial designs when the error distributions are skew. They obtained the modified maximum likelihood (MML) estimators of the ... -
Robust 2k factorial designs: Non-normal symmetric distributions
Şenoğlu, Birdal; Acitaş, S.; Kasap, P. (2012)Şenoglu (2005, 2007a) considered the estimation and hypothesis testing procedures for the 2k factorial designs when the error distributions are skew. They obtained the modified maximum likelihood (MML) estimators of the ... -
Robust Estimation With the Skew T(2) Distribution
Acıtaş, Şükrü; Kasap, Pelin; Şenoğlu, Birdal; Arslan, Olcay (Isoss Publ, 2013)In this paper, a skew extension of the Student's t distribution with two degrees of freedom is used to model data sets that have skewness and heavy-tails. Its parameters are estimated using two different approaches based ... -
Robust estimation with the skew t2 distribution
In this paper, a skew extension of the Student's t distribution with two degrees of freedom is used to model data sets that have skewness and heavy-tails. Its parameters are estimated using two different approaches based ... -
Robust factorial ANCOVA with LTS error distributions
Acıtaş, Şükrü; Şenoğlu, Birdal (Hacettepe University, Fac Sci, 2018)In this study, parameter estimation and hypotheses testing in the balanced factorial analysis of covariance (ANCOVA) model, when the distribution of error terms is long-tailed symmetric (LTS) are considered. The unknown ... -
Sağlam Tahmin Edicilere Dayanan Hedef Değerden Sapmalar X Kontrol Grafiği
Fidan, Hatice; Şenoğlu, Birdal (Anadolu Üniversitesi, 2007)Kısıtlı üretim yapmanın zorunlu olduğu durumlarda, aynı operatörden birçok farklı parçanın sınırlı sayıdaki üretiminde ya da zaman kısıtının bulunduğu durumlarda istatistiksel kalite kontrolünde az sayıda veri için ...
