Košťálová, Alena2020-06-032020-06-0320161336-8281http://drepo.uniza.sk/handle/hdluniza/104Time availability is one of the qualitative characteristics that are required for the universal postal service. The article aims to use statistical methods to determine the confidence interval for the average customer´s waiting time at the postal counter and the verification of compliance with the standards of the time availability of postal services specified in the “Requirements for the quality of postal services”.skhttp://creativecommons.org/licenses/by/4.0/universal postal servicequalityrequirements for the quality of postal servicestime availabilityconfidence intervalWorking Paperhttps://doi.org/10.26552/pte.C.2016.2.1