Statistics is used in two senses, singular and plural. In the singular, it concerns with the whole subject of statistics, as a branch of knowledge. In the plural sense, it relates to the numerical facts, data gathered systematically with some definite object in view. Thus, Statistics is the science, which deals with the collection, analysis and interpretation of data. An understanding of the logic and theory of statistics is essential for the students of agriculture who are expected to know the technique of analyzing numerical data and drawing useful conclusions. It is the intention of the author to keep the practical manual at a readability level at appropriate for students who do not have a mathematical background. This book has been prepared for the students and teachers as well to acquaint the basic concepts of statistical principles and procedures of calculations as per the syllabi of 5th Dean's committee of ICAR for undergraduate courses in agriculture and allied sciences.