Graziano & Raulin
Research Methods (8th edition)
Descriptive statistics describe aspects of a data set in a single number. Many descriptive statistics are also used in the computation of inferential statistics. In this section, we will be covering four classes of descriptive statistics. Those classes and their definitions are listed below.
Measures of Central Tendency - measures that indicate the typical or average score.
Measures of Variability - measures that indicate the spread of scores about the measure of central tendency.
Relative Scores - a score for an individual that tells how that individual performed relative to the other individuals on the measure.
Measures of Relationships - measures that indicate the strength and direction of a relationship between two or more variables.
In addition to these widely used descriptive statistics, we will also introduce some other less frequently used statistics, but statistics that you will occasionally run into, especially if you use computers to do your statistical analyses.
You can go directly to any of these sections by clicking the section in the Table of Contents below, or you can simply click on the Next Page button to go to the next page within this section.
Measures of Central Tendency |
Measures of Variability |
Relative Scores |
Measures of Relationship |
Other Descriptive Statistics |