Arranging data by grouping the observations into intervals and tabulating the frequencies for each interval. The result is called a grouped frequency table or grouped frequency distribution. In this distribution the intervals are called classes.
A piece of information or representation of facts or ideas which can be further processed is known as data. The weather forecast, maintenance of records, dates, time everything is related to the collection of data. The main purpose of the grouped frequency table is to find out how often each value occurred within each group of the entire data. The group frequency distribution is essentially a table with two columns.