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The article concerns the application of selected distributions of extreme values to estimate the risk of occurring of flood danger in Lower Silesia. In the study a daily water level on the Nysa Klodzka River was used, that was gathered in the hydrological station in Bystrzyca Klodzka. From the collected data from the period 1981-2013 biannual maximum water level was selected. Two theoretical distributions:...
Item response theory is considered to be one of the two trends in methodological assessment of the reliability scale. In turn, latent class models can be viewed as a special case of model-based clustering, for heterogenous multivariate discrete data. We used the approach combining item response theory and latent class models to find groups of Polish households’ with similar saving ability levels....
One of important forms of investment in human resources that can bring benefits both to individuals and the society as a whole is education. Raising the level of education, like any other investment, requires incurring costs in order to achieve certain profits. Balance between planned costs and potential benefits associated with the investment project determines the allocation of funds for its implementation...
The aim of the article is to present how to carry out the classical and logistic regression analyses in sample surveys, describing the socio-economic phenomena, to which complex a sample was drawn. The object of the study are households in Poland, surveyed in the household budgets survey, conducted annually by the Central Statistical Office. The essence of the methods analysis of complex samples is...
Regression analysis is perhaps the best known and most widely used method used for the analysis of dependence; that is, for examining the relationship between a set of independent variables (X’s) and a single dependent variable (Y). In general regression, the model is a linear combination of independent variables that corresponds as closely as possible to the dependent variable [Lattin, Carroll, Green...
The aim of the study was to compare, a posteriori, the probabilities (chances) of failure to achieve the level of aspiration (expressed in expected rates of return) on open-end debt investment funds (debt OEF), as well as the rates of return on bank deposits in Poland in light of different investment horizons. The data covered the periods of operation of each individual fund. The values for the probability...
The article discusses the two-step research procedure allowing the visualization of linear ordering results for metric data. In the first step, as a result of the application of multidimensional scaling (see [Borg, Groenen 2005; Mair et al. 2016]) the visualization of objects in two-dimensional space is obtained. In the next step, the linear ordering of a set of objects is carried out based on the...
In the article the author checked the properties of coherent measures of risk for Expected Value, Expected Shortfall, Maximum Loss (for losses weighted with probability), Median, Median Absolute Deviation, “Arithmetic Mean of Absolute Deviations from Median”, Quantiles, Cumulative Distribution Function and Mid-Range in connection with the last financial crisis. Methodology of the research – mathematical...
Modern enterprises use various spreadsheet financial models to project their financial situation as well as to address potential entrepreneurial activity risk exposure. The most advanced solution is provided by the Monte Carlo approach that offers much broader possibilities in terms of entrepreneurial risk measurement than in the case of traditional methods. One of the most significant problems of...
Item response theory (IRT) is widely used in educational and psychological research to model how participants respond to test items in isolation and in bundles. Item response theory has replaced classical measurement theory as a framework for test development, scale constructions, scree reporting and test evaluation. The most popular of the item response models for multiple choice tests are the one-parameter...
Nominal data, due to their nature, are often analysed statistically in a quite limited and traditional way. Usually they come from open-ended or simple/multiple choice questions. In typical research projects, such data are often presented in the form of more or less complex tables (including contingency tables) and standard charts. The author’s experience shows that such a visualisation is perceived...
This article outlines the creation of tools to measure spiritual sensitivity – Spiritual Sensitivity Inventory (SSI), starting from the assumptions underlying the source of its creation, through a phase of theoretical analysis of the construct used for development of an experimental method, a quantitative validation of the inventory, ending with a validation of quality, i.e. narrative interviews conducted...
The aim of the article is to present the usability of eye tracking as a method of research of customers’ behavior. The aim of the study has a theoretical and researching character. Apart from the essence of eye tracking research the article reveals the regulation procedure, recording session and eye tracking data forms presentation (heat maps, scan path and AOI). Special attention is focused on the...
Aggregated classification trees have gained recognition due to improved stability, and frequently reduced bias. However, the adaptation of this approach to the k nearest neighbors method (kNN), faces some difficulties: the relatively high stability of these classifiers, and an increase of misclassifications when the variables without discrimination power are present in the training set. In this paper...
In the following article the authors describe the problem of influence of a sample size and a method of handling missing values on the results and goodness of fit of the path relation model. In order to estimate the goodness of fit of the model the authors use the indicators which describe the internal (Cronbach’s Alfa, Composite Reliability) and external (R2) stability of the model. By the term “results...
The mobility of students is becoming an essential element of the education on the level of higher education, facilitating acquiring work. Universal opinion of the academic world is connected with it by the fact of the consistent growth of interest of students in this form of education. It is a universal view also in Russia. The purpose of the research, led in Poland and Russia, using the questionnaire,...
The paper discusses a model of matching process which was proposed by two American mathematicians: David Gale and Lloyd S. Shapley. The basic concept defined by them was the stable allocation, which can be achieved with so-called deferred acceptance algorithm. The article analyzes the problems discussed by the theory of stable allocations on the basis of graph theory. It has been shown that the issues...
The article is devoted to the role of a priori information on the basis of a meta- -analysis in the evaluation of the fit and accuracy of Technology Acceptance Model (TAM). This type of model is particularly used to analyze the attitudes and behavior towards new technologies (Moodle platform). In model construction three approaches are compared: structural model with the latent variables (SEM), Bayesian...
The article examines the determinants of corporate investments in fixed capital. The analysis was conducted based on unbalanced panel data of individual companies, employing at least 10 workers, contained in the annual reports of GUS F-02 for the years 1995- -2012. The systemic Generalized Method of Moments (robust) was used for the estimations. An empirical analysis of the determinants of corporate...
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