Institution: | 1. Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, Poznań, Polandsanna6@wp.pl;3. School of Business Information, Shanghai University of International Business and Economics, Shanghai, China;4. Statistics Sweden, Stockholm, Sweden;5. Department of Energy and Technology, Swedish University of Agricultural Sciences, Uppsala, Sweden;6. Department of Mathemathics, Link?ping University, Link?ping, Sweden |