APA Dictionary of Psychology

a table with three columns where the first column (labeled X) lists the possible values for a variable, the second column (labeled f, for frequency) lists the number of scores that occur at each of the possible values given in the first column, and the third column (labeled CF, for cumulative frequency) gives the running total of each of the values in the second column. This type of table is useful in descriptive statistics to depict the number of scores at or below each score level, and to provide an organized display of data that could also be graphed in a cumulative frequency polygon or cumulative curve. Also called cumulative distribution; cumulative frequency table.