1 Department of Statistics, Jahangirnagar University, Savar, Dhaka, Bangladesh; School of Mathematics, Statistics and Physics, Newcastle University, Newcastle upon Tyne, UK. Electronic address: hossainmm@juniv.edu.
2 Department of Applied Health and Nutrition, RTM Al-Kabir Technical University, Sylhet, Bangladesh. Electronic address: faruq@rtm-aktu.edu.bd.
3 School of Computing, Mathematics and Engineering, Charles Sturt University, Wagga Wagga, NSW 2678, Australia. Electronic address: azrahman@csu.edu.au.
4 Department of Statistics, Jahangirnagar University, Savar, Dhaka, Bangladesh. Electronic address: nhuq@juniv.edu.