Zmiany gęstości ludności miejskiej w centralnej Polsce. Estymacja rozkładu gęstości zaludnienia z wykorzystaniem nieparametrycznych estymatorów jądrowych (kernel function)

The article presents the results of the analysis of changes of the urban population density in Central Poland in the 20th century using one of the statistical methods meant for the estimation of discrete distributions, the so-called kernel function, and its brief characteristics. The studies cover the period, for which comparable data has been gathered (from 1931 to 2010). The results of the studies have been presented in a textual form and on 9 drawings, showcasing the changes of the population density in Central Poland in the analyzed period.