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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Varying coefficient models
 Sekera, Michal ; Maciak, Matúš (advisor) ; Komárek, Arnošt (referee)
The aim of this thesis is to provide an overview of the varying coefficient mod- els - a class of regression models that allow the coefficients to vary as functions of random variables. This concept is described for independent samples, longi- tudinal data, and time series. Estimation methods include polynomial spline, smoothing spline, and local polynomial methods for models of a linear form and local maximum likelihood method for models of a generalized linear form. The statistical properties focus on the consistency and asymptotical distribution of the estimators. The numerical study compares the finite sample performance of the estimators of coefficient functions. 1
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Confidence bands for regression curves
 Zavřelová, Adéla ; Hlávka, Zdeněk (advisor) ; Maciak, Matúš (referee)
This thesis deals with the constructions of the confidence band for a linear regression model. Basic characteristics of a linear model are given and constructions of different confidence bands are described for models, where the relationship is set by a one variable function. The main focus is on bands of polynomial models.
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Statistical analysis of the consumption of table wine in the Czech Republic with a specific focus on boxed wine
 Procházková, Romana ; Šimpach, Ondřej (advisor) ; Jeřábková, Věra (referee)
The aim of this work is a statistical analysis of the consumption of table wine in the Czech Republic with a specific focus on boxed wine. The work is divided into three parts. The first section describes the basic theoretical concepts and statistical methods used in the practical part of this work. The second part analyzes the respondents' answers to survey questions of MML-TGI (Market & Media & Lifestyle -- Target Group Index). The third part is focused on the analysis of time series - the evolution of prices of table wines. The conclusion summarizes the results of this work. Based on the polynomial regression approach the time series of average prices for individual types of table wine are aligned, and they are clearly shown in the graphs.
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