CONTENTS Preface (v) Chapter Pages 1. Introduction 1 2. Survey of Rules and Principles 9 3. Measures of Central Tendency and Variability 25 4. Simplifying Statistical Computations 42 5. Graphical Representation of Frequency Distributions 63 6. Standard Scores and Normalizing Distributions 79 7. Linear Regression 91 8. The Product-Moment Correlation Coefficient 112 9. Random Errors of Measurement 133 10. Point Coefficients and Other Measures of Association 142 11. Probability and the Binomial Distribution 167 12. The Normal Distribution 180 13. The f Test for the Means of Independent Samples 192 14. The Difference between the Means for Paired Observations and Equated Groups216 15. The Significance of Correlation and Regression Coefficients 234 16. The Analysis of Variance 246 17. Further Applications of the Analysis of Variance 265 18. The x2 Test of Significance 286 19. Significance Tests for Ranked Data 311 Bibliography . 343