Yazar "Yazıcı, Berna" için Fen Fakültesi listeleme
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Modified tests for comparison of group means under heteroskedasticity and non-normality caused by outlier(s)
Çavuş, Mustafa; Yazıcı, Berna; Sezer, Ahmet (Hacettepe University, Fac Sci, 2017)There are several approximate tests proposed such as Welch's F-test (W), the Parametric Bootstrap Test (PB) and Generalized F-test (GF) for comparing several group means under heteroskedasticity. These tests are powerful ... -
Robust ridge and robust Liu estimator for regression based on the LTS estimator
Kan Kılınç, Betül; Alpu, Özlem; Yazıcı, Berna (Taylor & Francis LTD, 2013)In the multiple linear regression analysis, the ridge regression estimator and the Liu estimator are often used to address multicollinearity. Besides multicollinearity, outliers are also a problem in the multiple linear ... -
A simulation study on generalized pareto mixture model
Çavuş, M.; Sezer, A.; Yazıcı, Berna (Springer Verlag, 2015)The Generalized Pareto Distribution is commonly used for extreme value problems. Especially, the values which exceed the finite threshold, is the focus in extreme value problems like in insurance sector. The Generalized ... -
Statistical methods and artificial neural networks
Mammadov, Mammadağha; Yazıcı, Berna; Yolaçan, Ş.; Aslanargun, A.; Yüzer, Ali Fuat; Ağaoğlu, E. (2006)Artificial Neural Networks and statistical methods are applied on real data sets for forecasting, classification, and clustering problems. Hybrid models for two components are examined on different data sets; tourist arrival ... -
Using multivariate adaptive regression splines to estimate pollution in soil
Kan Kılınç, Betül; Malkoc, Semra; Koparal, Ali Savaş; Yazıcı, Berna (Inst Advanced Science Extension, 2017)Heavy metal pollution is one of the main factors of the traffic pollution. The public authorities have been monitoring the concentration of heavy metal by means of sampling stations. This paper describes the response surface ... -
Variable selection with genetic algorithm and multivariate adaptive regression splines in the presence of multicollinearity
Kan Kılınç, Betül; Asikgil, Barış; Erar, Aydın; Yazıcı, Berna (Inst Advanced Science Extension, 2016)In this paper, it is aimed to determine the true regressors explaining the dependent variable in multiple linear regression models and also to find the best model by using two different approaches in the presence of low, ...