Workbook for Statistical Methods in Education and Psychology Pretest of Mathematical Essentials for Statistics 1. The Nature of Statistical Methods 2. Averages 3. The Standard Deviation 4. Normal Probability Curve 5. Statistical Inference 6. Percentiles and Percentile Ranks 7. Skewness and Transformed Scores 8. Pearson Product Moment Coefficient of Correlation 9. Regression Equations 10. More Measures of Correlation 11. Chi Square 12. Nonparametric Statistics Other than Chi Square 13. Simple Analysis of Variance 14. Standard Errors of Differences.