Statistics Primer Introduction Representation of Data Descriptive Statistics Correlational Statistics Inferential Statistics Summary Glossary Summary Representation of Data Data are often represented in frequency distributions, which indicate the frequency of each score in a set of scores.
Psychologists also use graphs to represent data.
These include pie graphs, frequency histograms, frequency polygons, and line graphs. Line graphs are important in representing the results of experiments, because they are used to illustrate the relationship between independent and dependent variables. Descriptive Statistics Descriptive statistics summarize and organize research data. Measures of central tendency represent the typical score in a set of scores. The mode is the most frequently occurring score, the median is the middle score, and the mean is the arithmetic average of the set of scores.