This chapter introduces elementary descriptive statistics: mean, mode, median, varnance, standard deviation, correlation, and cross-tabulation.  Examples of each are provided.
 
Median
Mode
Skewness
Percentile
Variance
Standard Deviation
Range
Rate of Change
Multivariate Descriptive Statistics
Bivariate and Multivariate Statistics
Cross-Tabulations
Cross-Tabulations and the Analysis of Frequency using Frequency Calculations
Correlation
Multiple Correlations
Correlation is not Causation
Summary
Appendix: Case Study Showing the Calculations for a Correlation Coefficient