Statistical methods in socio-economic research [proceedings] : theory and applications : 22nd slovak-polish-ukrainian scientific seminar : Virt, 20th - 23rd october, 2015 - Hurbánková, Ľubica, 1980-; Vojtková, Mária, 1966-; Rublíková, Eva; Terek, Milan (ŠEVT, 2016)