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Introduction to Six Sigma Method and its Application for Process Improvements
Joska, Jakub ; Žák, Libor (referee) ; Bednář, Josef (advisor)
First part of the thesis deals with the description of Six sigma method and its most commonly used methodology DMAIC. The second part is a brief introduction of specific practical problem - electroforming. The third part describes the statistical tools used to solve the given task, especially the Pearson's chi-squared test of independence. The last part of the thesis contains a summary of data, calculation itself and data analysis results.
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Testing independence in two-by-two tables
Obukhov, Andrey ; Omelka, Marek (advisor) ; Kulich, Michal (referee)
The main purpose of this work is to describe three well-known statistical tests of independence in two-by-two contingency tables. We will deeply study chi- squared test of independence, Fisher's exact test and Barnard's test and apply them on examples. Also we will describe, in general, categorical variables, which are often analysed using a multinomial distribution. At the end we will apply tests on the examples, using data simulated from a multinomial and binomial distribution. 1
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Testing independence in two-by-two tables
Obukhov, Andrey ; Omelka, Marek (advisor) ; Kulich, Michal (referee)
The main purpose of this work is to describe three well-known statistical tests of independence in two-by-two contingency tables. We will deeply study chi- squared test of independence, Fisher's exact test and Barnard's test and apply them on examples. Also we will describe, in general, categorical variables, which are often analysed using a multinomial distribution. At the end we will apply tests on the examples, using data simulated from a multinomial and binomial distribution. 1
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Introduction to Six Sigma Method and its Application for Process Improvements
Joska, Jakub ; Žák, Libor (referee) ; Bednář, Josef (advisor)
First part of the thesis deals with the description of Six sigma method and its most commonly used methodology DMAIC. The second part is a brief introduction of specific practical problem - electroforming. The third part describes the statistical tools used to solve the given task, especially the Pearson's chi-squared test of independence. The last part of the thesis contains a summary of data, calculation itself and data analysis results.
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The specifics of speech from mothers with young children
AŠKOVÁ, Tereza
This diploma thesis follows my bachelor thesis in which the mother slang was described. This diploma thesis is aimed at the performance of the mother speech research, i.e. the use of specific expressions and language resources used by mothers of small children in Internet discussions in relevant forums or web pages. The diploma thesis aims at creating a questionnaire and establishing five hypotheses. The first part of the thesis describes the methodology of this research, in the following part there are presented the data obtained by the questionnaire survey. The hypotheses are verified in the following section, and the hypothesis testing procedure is described here. The appendix includes the questionnaire and a table of critical values that specifies the data that are needed for verifying hypotheses.
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Motivation Factors of a Rightful Tax Return
Urbánková, Kateřina ; Kubátová, Květa (advisor) ; Beneš, Jonáš (referee)
The diploma thesis deals with the motivation factors of a rightful tax return. The aim of the thesis was to identify influence of attitude, subjective norms and behavioural control on a truthfulness of a taxpayer when filling in the tax return. The first part of the thesis is aimed on definition of a tax evasion. Furthermore, this part deals with the causes of tax evasions as well as with ethical point of view on tax evasions in general. The second part of the thesis deals with the indicators of extent and evolution of tax evasions in the Czech Republic and in the European Union. The indicators of tax evasions are the following: shadow economy, tax gap of VAT, tax quota, corruption index and frequency of tax control. The third part includes the results of the questionnaire survey that was realised among the Czech entrepreneurs. The results show the cases of tax evasions that the entrepreneurs may have consider as rightful. Thereafter, using the chi-squared test, the analysis examined whether the attitude of the entrepreneurs towards the tax evasions is influenced by the factors as company seat, annual turnover or number of employees. In several cases, the research confirmed an existence of dependence between attitude of entrepreneurs towards tax evasions and the factors stated above.
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