Definitions

• Data Set a collection of related values.
• The Mean is the mathematical average of your data set.
• Median is a basic statistic that describes a different type of average. It represents the "middle" of a data set, with half its numbers higher than the median and half lower.
• Mode represents the value or values that occur most often in a data set. (If no value occurs more than once, the data set is said to have no mode.)
• Range describes the degree of variety in your data set. A large range indicates a more varied data set, while a small range indicates the data is very similar.

• How to Read a Bar Graph - This brief tutorial explains the various parts of a bar graph and shows how it is used to visually represent information.
• How to Read a Line Graph - This brief tutorial explains the various parts of a line graph and shows how it is used to visually represent information.
• How to Read a Pie Chart - This brief tutorial explains the various parts of a pie chart (or pie graph) and shows how it is used to visually represent information.
• How to Read a Table - This brief tutorial explains the various parts of a data table and shows how it is used to visually represent information.