The frequency is how often a value occurs in an interval, while the distribution is the pattern of frequency of the variable. They are often depicted in a graph or table.

When the INTERVAL= option is not given, the default frequency defined for the FILETYPE= type file is used. For example, the statements in the previous section extract yearly series since INTERVAL=YEAR ...

In National 4 Maths learn to calculate the mean, mode, median and range from a frequency table. Draw a pie chart and find the chance of it happening.