This document discusses statistical techniques for analyzing data, including measures of location (mean, median, mode) which represent a single value for the data set, and measures of dispersion (range, standard deviation) which represent the spread of the data set. It provides examples of calculating the mean, median, and mode of sample data sets. The mean is most affected by extreme values, while the mode may be more useful than the median or mean for data with multiple instances of the same value. The advantage of the mean is that it uses all data values in its calculation.