The document provides information about calculating the mean, median, mode, and range of data sets. It defines each term and provides examples of how to calculate them. The mean is calculated by adding all values and dividing by the number of values. The median is the middle value when values are arranged in order. The mode is the value that appears most frequently. The range is calculated by subtracting the lowest value from the highest value, and a large range means values vary widely while a small range means values are similar.