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(Wydawnictwo Uniwersytetu Łódzkiego, 2020-11-23)We study an experiment in which we determine unknown measurements of p objects in n weighing operations according to the model of the chemical balance weighing design. We determine a design which is D‑optimal. For the ...
(Wydawnictwo Uniwersytetu Łódzkiego, 2020-11-04)Areas of research in economics and management science become increasingly close – they overlap and become very similar. New events, new products of people’s actions, new patterns of behaviour arise with a pace unknown ...
(Wydawnictwo Uniwersytetu Łódzkiego, 2020-09-22)Design‑based estimation of finite population parameters such as totals usually relies on the knowledge of inclusion probabilities characterising the sampling design. They are directly incorporated into sampling weights and ...
Examining Selected Theoretical Distributions of Life Expectancy to Analyse Customer Loyalty Durability. The Case of a European Retail Bank (Wydawnictwo Uniwersytetu Łódzkiego, 2020-11-04)One of the key elements related to calculating Customer Lifetime Value is to estimate the duration of a client’s relationship with a bank in the future. This can be done using survival analysis. The aim of the article is ...
(Wydawnictwo Uniwersytetu Łódzkiego, 2020-11-04)The purpose of this publication is to propose a permutation test to detect the departure from symmetry in multidimensional contingency tables. The proposal is a multivariate extension of McNemar’s test. McNemar’s test could ...