Original: Height range Number of students Cumulative number 4.5   5.0 feet 25 25 5.0   5.5 feet 35 60 5.5   6 feet 20 80 6.0   6.5 feet 20 100 A Frequency Distribution shows us a summarized grouping of data divided into mutually exclusive classes and the number of occurrences in a class.
Simplified: Height range Number of students Cumulative Number 4.5 -5.0 feet 25 25 5.0-5.5 feet 35 60 5.5-6 feet 20 80 6.0-6.5 feet 20 100 Applications Managing and operating on frequency tabulated data is much simpler than operation on raw data.