**Author details**

Mohammad Salim Zahangir\* and Mosammat Zamilun Nahar Department of Statistics, University of Chittagong, Chattogram, Bangladesh

\*Address all correspondence to: salim.zahangir@cu.ac.bd

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
