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This extensively revised and fully updated second edition is designed as a textbook for M.A. (Education), M.Ed., M.A. (Psychology and Sociology) and for research students pursuing courses in Statistics related to these subjects. It takes into account the present syllabi of various universities and institutes of education across the country. What's New to the Second Edition : Six new chapters added with empha-sis on advanced statistical concepts and techniques such as the following : Some chapters modified and reshuffled to reflect the new emphasis. Entire text thoroughly checked and marked improvements made to bring the topics uptodate. About the Author S. K. MANGAL, Ph.D., formerly, Principal, Professor and Head of Department of Postgraduate Studies, C.R. College of Education, Rohtak, Haryana, has been a distinguished teacher, administrator, and researcher. He has devised certain educational and psychological tests like Teacher Adjustment Theory and Emotional Intelligence Theory. Professor Mangal has written many articles in international journals. Table of Contents Preface Preface to the First Edition Statistics-Meaning and Use Organization of Data Graphical Representation of Data Measures of Central Tendency Percentiles and Percentile Rank Measures of Variability Linear Correlation The Normal Curve and its Applications Significance of the Mean and Other Statistics Significance of the Difference between Means Chi Square and Contingency Coefficient Further Methods of Correlations Partial and Multiple Correlation Regression and Prediction Scores Transformation Non-Parametric Tests Analysis of Variance Analysis of Covariance Answers Appendices Bibliography Index