Przeglądaj według tematu "C12"
Wyświetlanie pozycji 1-8 z 8
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A Simulation Study on the Sample Size in the Mann‑Whitney Test in the Case of Pareto Distribution
(Wydawnictwo Uniwersytetu Łódzkiego, 2019)In the paper, the problem of determination of the number of observations necessary for the appropriate use of the non‑parametric Mann‑Whitney test in the case of Pareto distribution is presented. Using the method provided ... -
Analiza zależności przyczynowych w ryzyku między rynkiem ropy naftowej a rynkami reprezentującymi inne klasy aktywów
(Wydawnictwo Uniwersytetu Łódzkiego, 2016)With the increasing volatility of the financial instruments, particularly oil which is a strategic energy resource, there is a need to acquire the financial markets wider than ever range of the analyses. The concept of ... -
Dynamiczno‑przestrzenna analiza zjawiska przenoszenia zmienności między rynkami reprezentującymi różne klasy aktywów z uwzględnieniem zmian cen ropy naftowej w latach 2000–2015
(Wydawnictwo Uniwersytetu Łódzkiego, 2017)In the face of the numerous turbulence on the global financial markets the need for a more profound look at the phenomenon of volatility transfer between different markets increases because as a consequence of this phenomenon ... -
A New Test for Independence in 2×2 Contingency Tables
(Wydawnictwo Uniwersytetu Łódzkiego, 2017)In statistical literature there exist many tests to reveal the independence of two qualitative variables in two‑way contingency tables (CTs), in particular in 2×2 CTs. In this paper four independence tests were compared. ... -
On Testing Significance of the Multivariate Rank Correlation Coefficient
(Wydawnictwo Uniwersytetu Łódzkiego, 2018)The Spearman’s rho is a measure of the strength of the association between two variables. There are some extensions of this coefficient for the multivariate case. Measures of the multivariate association which are the ... -
On the Monitoring Complex Multivariate Processes
(Wydawnictwo Uniwersytetu Łódzkiego, 2016)This article presents a proposal of the method of monitoring complex multidimensional processes. The problem relates to monitoring the quality of production with some attribute variables when the production is performed ... -
On the Use of Permutation Tests in the Analysis of the Factorial Design of Experiment Results
(Wydawnictwo Uniwersytetu Łódzkiego, 2019)An experimental design is one of the tools which are used in statistical quality control. The proper implementation of experimental design results in the improvement of technological outcomes of a manufacturing process, ... -
Selected Statistical Tests for Median and Their Properties
(Wydawnictwo Uniwersytetu Łódzkiego, 2017)In the paper, a selection of statistical tests for median are presented. In particular, parametric and nonparametric significance tests are considered. In the case of parametric tests the critical regions are constructed ...