This document provides information on measures of central tendency and dispersion. It discusses the mean, median, and mode as the three main measures of central tendency. It provides formulas and examples for calculating the mean, median, and mode for both ungrouped and grouped data. The document also covers measures of dispersion including range, semi-interquartile range, variance, standard deviation, and coefficient of variation. It provides formulas and examples for calculating each of these measures. Finally, the document briefly discusses chi-square tests, Pearson's correlation, and using scatterplots to examine relationships between variables.