Textbook and reference books are important learning sources for the students. Keeping this in mind we, the three like-minded academicians, came together in 2020 to write this book. More importantly, we took the learners' needs into consideration.

Intentions of the students enrolled for undergraduate or graduate programs in Statistics must be different from those of the students enrolled for programs in other disciplines. We also thought of the context and geographical location of our learners in writing this book.