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At the present time we can observe significant changes in customers' behavior in creating demand for particular goods. ICT usage plays more and more important role in this process. Information technologies bring higher availability of information necessary to apply a purchase decision, which increases demand elasticity. This article analyses the ICT usage development in regard to an age structure of inhabitants in the Czech Republic since 2009 to 2018. Crucial role in this development has been played by availability of a mobile internet connection. In the article there were used source data of the Czech Statistical Office. In the observed period there was found out an increasing linear trend in all age categories for the variable "Individuals using ICT for searching for travel and accommodation information in the Czech Republic" in percents. All regression functions have shown high values of coefficients of determination (0.675 - 0.933). The method of double sorting analysis of variance at the level of importance  = 0.05 found out statistically conclusive F-tests for the sorting criteria "Age Category" and "Year". Detailed evaluation of the analysis of variance differentiated individual pairs of averages of the analyzed sorting categories.