Preface, Part I Chapter-1 Some basic concepts and definitions; Chapter-2 Probability; Chapter-3. Presentation of data; Chapter-4. Analysis of data; Chapter-5. Measures of Dispersons; Part II Chapter-6 Normal distribution; Chapter-7 Standard errors of averages; Chapter-8. Students “t”; Chapter-9 Test of Significance; Chapter-10. Sampling; Chapter-11. Point sampling; Part III Chapter-12 Regression and correlation; Chapter-13. Fitting of curves.