Browsing İstatistik Bölümü by Title

Now showing items 107-126 of 206

    • Karesel Olumsallık Tablolarında Düzey Ayırt Edilebilirliği ve Uyum 

      Yılmaz, Ayfer Ezgi (Fen Bilimleri Enstitüsü, 2017)
      In square contingency tables, analysis of agreement between the row and column classifications is of interest. For nominal categories, kappa coefficient is used to summarize the degree of agreement between two raters. For ...

    • Karesel Olumsallık Tablolarında Model Uyumunun Sapma Ölçüsü ile Belirlenmesi 

      Altun, Gökçen (Fen Bilimleri Enstitüsü, 2018)
      The joint distribution of categorical variables is summarized by the contingency table. The R × R dimensional contingency tables in which the variables are cross classified according to the same criteria with the number ...

    • Karesel Olumsallık Tablolarında Simetrik Olmayan Modeller 

      Efendioğlu, Gökçen (Fen Bilimleri Enstitüsü, 2015)
      Joint distribution of categorical variables is summarized with contingency tables. Square contingency tables represent the equality of level of row and column variables. The data used for analysis of square contingency ...

    • Kategorik Veri Çözümlemesi 

      Saraçbaşı, Tülay; Aktaş Altunay, Serpil (Hacettepe Üniversitesi Yayınları, 2016)
      Kamuoyu, Tüketici-Pazar, Sosyoloji, Psikoloji ve Halk Sağlığı alanında yapı­lan çalışmalar, toplumsal araştırmalardır. Toplumsal araştırmalarda elde edilen veriler kategorik olarak düzenlenir. Çalışmaların en doğru biçimde ...

    • Kedi Sürüsü Optimizasyonuna Dayalı Yeni Bir Bulanık Zaman Serisi Yaklaşımı 

      Gündoğdu, Yasemin Burcu (Fen Bilimleri Enstitüsü, 2018)
      Since there are no theoretical constraints such as the model assumption and the number of observations, the importance of the preferred fuzzy time series instead of classical time series is day by day increasing in analysis ...

    • Kesikli Yaşam Süresi Modelleri 

      Ölmez Hosta, Hilal (Fen Bilimleri Enstitüsü, 2016)
      The survival analysis is a statistical research method dealed with the dur ati on of a unit from the beginni ng of observation until the interested event takes place. Survival analysis which is used ...

    • Kesirli Polinomlar ile Yaşam Modelleri 

      Dinç , Hazal (Fen Bilimleri Enstitüsü, 2019)
      The use of regression models with fractional polynomial was proposed to model nonlinear effects of covariates. The inclusion of continuous covariates as continuous in the model and its inclusion in the model as a categorical ...

    • Klasik ve Bayesci Yapısal Eşitlik Modellerinde Parametre Tahminlerinin Karşılaştırılması: Sıralı Kategorik Verilerle Bir Uygulama 

      Erkan , Gizem (Fen Bilimleri Enstitüsü, 2019)
      This study compared with the parameter estimation methods of Maximum Likelihood (ML) and Bayesian approximation as Structural Equation Models (SEM) commonly used in analyzing the casual link. In the absence of classical ...

    • Kredi Temerrüt Takası Primleri İle Çeşitli Ekonomik Göstergeler Arasındaki İlişkiler 

      Bursa, Nurbanu (Fen Bilimleri Enstitüsü, 2013)
      Determining the economic variables that affect credit default swap spreads which are known as indicator of country risk and modelling these spreadss have great importance in terms of financial world. In this study, after ...

    • Krom Üretim Miktarı ve Fiyatının Panel Veri Kullanılarak Modellenmesi 

      Babadağlı, Semiha (Fen Bilimleri Enstitüsü, 2019)
      Within the scope of the thesis, by providing the information about the chrome mine, the factors affecting the quarry sales price, quarry sales amount and the right of government have been examined thanks to the data obtained ...

    • Markov Zinciri Monte Carlo Yönteminin Dinamik Doğrusal Modellere Uygulanması 

      Gürkan, Hatice Yağmur (Fen Bilimleri Enstitüsü, 2013)
      This study deals with implementing three different types of dynamic linear models using dlm package in R. These models are the steady model, the linear growth model and the combined model as a second order polynomial model ...

    • Medyan Sıralı Küme Örneklemesi Yönteminde Kitle Ortalamasının Tahmini 

      İskit, Toy (Fen Bilimleri Enstitüsü, 2018-10-08)
      Ranked set sampling methods are used when it is costly or difficult to measure the sampling units precisely with respect to the variable of interest and also when these units can be more easily ranked with respect to the ...

    • Mekânsal Panel Veri Modelleri: Havacılık Sektöründe Bir Uygulama 

      Çubukçu, Arzu (Fen Bilimleri Enstitüsü, 2021-01-25)
      When analyzing the data with geographical units (cities, countries, states, regions, etc.), it should be investigated whether neighboring units have spatial effects on each other. Because it is assumed that geographical ...

    • Meteorolojik Mekansal Verilerin İstatistiksel Yöntemler ile Analizi: Çatalan Baraj Gölü Havzası Örneği 

      Namkhai, Otgonbayar (Fen Bilimleri Enstitüsü, 2019)
      In hydrology, which is a sub-discipline of earth sciences, spatial analysis methods are needed to determine the spatial arial distribution (x, y, z, t) of the hydrometeorological data as point (x, t) time series data. ...

    • Modified Estimators For The Change Point In Hazard Function 

      Karasoy, Durdu; Kadilar, Cem (Elsevier Science Bv, 2009)
      We propose the consistent estimators for the change point in hazard function by improving the estimators in [A.P. Basu, J.K. Ghosh, S.N. Joshi, On estimating change point in a failure rate, in: S.S. Gupta,J.O. Berger (Eds.), ...

    • Modified Welch Test Statistic For Anova Under Weibull Distribution 

      Karagoz, Derya (Hacettepe Univ, Fac Sci, 2016)
      A modification to Welch test statistic is proposed to test the equality of population means of various groups under a Weibull distribution. The proposed test statistic is simple and corresponds to the standard Welch test ...

    • National Practice In Antibiotic Prophylaxis In Breast Cancer Surgery 

      Eroglu, Aydan; Karasoy, Durdu; Kurt, Halil; Baskan, Semih (2014)
      Background Although breast cancer surgery is regarded as a “clean” surgery, surgical site infection (SSI) rates are higher than expected. There is no consensus regarding the use of antibiotic prophylaxis in elective breast ...

    • Nedensellik Analizi ve Gri İlişkisel Analiz İle Performans Sıralaması: G20 Ülkeleri Üzerine Bir Çalışma 

      Şimşek, Volkan (Fen Bilimleri Enstitüsü, 2018-11)
      In this thesis study, it is aimed to measure and rank the economic performances of countries by using the basic economic parameters specified in the study by using Gray Relational Analysis (GRA) method, which is one of the ...

    • Odd Burr Lindley Distribution With Properties And Applications 

      Altun, Gokcen; Alizadeh, Morad; Altun, Emrah; Ozel, Gamze (Hacettepe Univ, Fac Sci, 2017)
      In this study, we introduce a new model called the Odd Burr Lindley distribution which extends the Lindley distribution and has increasing, bathtub and upside down shapes for the hazard rate function. It includes the odd ...

    • On Gamma Inverse Weibull Distribution 

      Abbas, Salman; Hameed, Mahjabeen; Cakmakyapan, Selen; Malik, Sarfraz Nawaz (2019)
      The inverse Weibull distribution which was first introduced to investigate the decay of mechanical components is widely used in the field of biology, especially in the areas of survival and reliability analysis. In this ...