Consider a group of 50 individuals participating in a marathon. Suppose the organizers of the marathon want to know how the number of participants varies with age. To find out, the data are summarized using a frequency distribution table. It is a statistical tool that represents data divided among several categories or classes against the number of values for each class called the frequency. Frequency tables help in understanding the occurrences and distribution of data in the data set. For example, a frequency table helps in visualizing the distribution of students according to height. Similarly, the pulse rate variation among a group of patients can be easily visualized using a frequency distribution table.