1. Appendix B: Statistical Methods

2. Statistical Methods: Graphing Data Frequency distribution Histogram Frequency polygon

3. Figure B.1 Graphing data

4. Descriptive Statistics Measures of Central Tendency Mean Median Mode Skewed Distributions Negative/Positive Measuring Variability Standard Deviation

5. Figure B.2 Measures of central tendency

6. Figure B.3 Measures of central tendency in skewed distributions

7. Figure B.4 The standard deviation and dispersion of data

8. Figure B.5 Steps in calculating the standard deviation

9. The Normal Distribution Psychological tests –Relative measures –Standard deviation the unit of measure Conversion to percentile scores

10. Figure B.6 The normal distribution

11. Figure B.7 The normal distribution and SAT scores

12. Measuring Correlation Correlation coefficient –Positive = direct relationship –Negative = inverse relationship Magnitude: 0 to plus/minus 1 Scatter diagrams Correlation of determination

13. Figure B.8 Scatter diagrams of positive and negative correlations

14. Figure B.9 Scatter diagram of the correlation between TV viewing and SAT scores

15. Figure B.10 Computing a correlation coefficient

16. Figure B.11 Correlation and the coefficient of determination

17. Hypothesis Testing Inferential statistics Sample Population Null hypothesis vs. research hypothesis Statistical significance

18. Figure B.12 The relationship between the population and the sample