http://hdl.handle.net/11089/7005 METODY ILOŚCIOWE W GLOBALNEJ GOSPODARCE Sun, 05 Apr 2026 16:23:22 GMT 2026-04-05T16:23:22Z https://dspace.uni.lodz.pl:443/bitstream/id/e1ee2c19-00b4-4647-86ba-7c89f4454076/ http://hdl.handle.net/11089/7005 http://hdl.handle.net/11089/7033 O wyznaczaniu kwantyli rozkładu w szeregach rozdzielczych przedziałowych Jurkiewicz, Tomasz Interval frequency distributions used as a secondary data do not provide full information about the distribution of the variable of interest. In order to estimate quantiles, it is common to use one of interpolation formulae based on the assumption that the distribution of the variable is uniformly distributed in each interval. This assumption, if not met, may result in large bias. Author suggests using different formulae, which do not require uniform distribution in intervals, and depend on the frequencies of neighbouring intervals. Simulation experiments were applied for the normal and lognormal distributions to assess efficiency of both kinds of interpolation formulae. Different population sizes and different numbers of intervals in the frequency distribution were also considered. Thu, 01 Jan 2009 00:00:00 GMT http://hdl.handle.net/11089/7033 2009-01-01T00:00:00Z http://hdl.handle.net/11089/7032 Organizacja wywiadu z kwestionariuszem ankietowym do badania jakości usług Olbrych, Barbara The article focuses on organization of a direct interview with a survey questionnaire to conduct research into quality of services provided by the HELIOS Film Centre in Radom. The factors which may influence customer satisfaction are identified, a quality evaluation map has been constructed and the satisfaction indicator has been calculated. On the basis of a pilot sample the survey questionnaire has been tested as well as the IPA technique, which was used for the analysis of services of this institution for the first time. The results obtained are a starting point for fundamental research which requires separate development. Thu, 01 Jan 2009 00:00:00 GMT http://hdl.handle.net/11089/7032 2009-01-01T00:00:00Z http://hdl.handle.net/11089/7031 O wyznaczaniu dominanty rozkladu cechy ciągłej w szeregach szczegółowych Jurkiewicz, Tomasz; Kozłowski, Arkadiusz One of the main descriptive characteristics is the mode. For continuous variables it is not always easy to properly determine the mode. There are some estimates of the mode provided in literature, however, unlike the median or the arithmetic mean, for the mode there does not exist the estimator which would be commonly considered as the best one. Moreover, in many statistical textbooks and computer packages this problem seems to be ignored. In this paper authors consider seven different methods of estimation the mode presented in literature. The efficiency of the estimation procedures has been evaluated on the basis simulation experiments for the normal and lognormal distributions with different degrees of skewness. The evaluation criteria of those procedures involve not only the efficiency of estimation but also simplicity of computation, which is an important aspect of teaching statistics. Thu, 01 Jan 2009 00:00:00 GMT http://hdl.handle.net/11089/7031 2009-01-01T00:00:00Z http://hdl.handle.net/11089/7030 Nowe koncepcje wprowadzania całek oznaczonych uniwersyteckich wykładach matematyki Kupczun, Janusz The purpose of this paper is a brief discussion of some recent ideas, that could be useful for more intuitive and more modern teaching of calculus (i.e. mathematical analysis). I limited myself to the fundamental concepts of integrals. However my intention was to contribute to elucidations of many similar topics. In my opinion, now is the time of change of form and contents, of many routine and often boring courses. Thu, 01 Jan 2009 00:00:00 GMT http://hdl.handle.net/11089/7030 2009-01-01T00:00:00Z