Browsing İstatistik Bilim Dalı by Author "Çankaya Üniversitesi, İktisadi ve idari bilimler Fakültesi, İstatistik Bilim Dalı"

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Effect of estimation under nonnormality on the phase II performance of linear profile monitoring approaches

Aytaçoğlu, Burcu; Bayrak, Özlem Türker (Wiley, 2019-11)

The number of studies about control charts proposed to monitor profiles, where the quality of a process/product is expressed as function of response and explanatory variable(s), has been increasing in recent years. However, ...
Inference of Autoregressive Model with Stochastic Exogenous Variable Under Short-Tailed Symmetric Distributions

Bayrak, Özlem Türker; Dener Akkaya, Ayşen (Springer International Publishing AG, 2018-12)

In classical autoregressive models, it is assumed that the disturbances are normally distributed and the exogenous variable is non-stochastic. However, in practice, short-tailed symmetric disturbances occur frequently and ...
Linear contrasts in one-way classification AR(1) model with gamma innovations

Şenoğlu, Birdal; Bayrak, Özlem Türker (Hacettepe Univ, Fac Sci, 2016-12)

In this study, the explicit estimators of the model parameters in oneway classification AR(1) model with gamma innovations are derived by using modified maximum likelihood (MML) methodology. We also propose a new test ...

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