Essentials of Statistics

Statistics has become an indispensable tool in almost every field of human inquiry-science, commerce, economics, medicine, engineering, social sciences, and public policy. With the rapid growth of data-driven decision making, a sound understanding of statistical principles is essential for students pursuing higher education in quantitative disciplines.The main objective of this book is to build strong foundational knowledge while developing analytical thinking and problem-solving skills among students. Theoretical concepts are presented in a simple and logical manner, supported by suitable illustrations, worked examples, and exercises. Special emphasis has been laid on clarity of exposition, step-by-step derivations, and practical interpretation of results so that students can relate statistical techniques to real-life situations. Each chapter begins with a brief introduction to the topic and concludes with a set of carefully graded problems to help students test and strengthen their understanding. Efforts have also been made to maintain mathematical precision without compromising accessibility for beginners.