The assessment of the data was based on various mathematical–statistical methods fitting to the topic of the research.
The Bartlett test and the Kaiser–Meyer–Olkin measure were applied to prove the reasonableness of factor analysis (to find correlations between various variables).
Combined factor and cluster analysis was used to define various consumer segments (Blankenship & Breen, 1993; Clifton, Nguyen, & Nutt, 1992; Malhotra, 2008; Scipione, 1994).