1. INTRODUCTION, 2. GRAPHICAL REPRESENTATION OF DATA, 3. MEASURE OF CENTRAL TENDENCY, 4. MEASURE OF DISPERSION AND SKEWNESS, 5. CORRELATION AND REGRESSION,
6. PARTIAL CORRELATION, 7. THEORETICAL FREQUENCY DISTRIBUTION, 8. METHOD OF LEAST SQUARE AND CURVE FITTING, 9. SAMPLING OF DATA, 10. TEST OF SIGNIFICANCE : CHI-SQUARE AND F-TEST, APPENDIX