How to Make a Graph on Excel With a Cumulative Average. A cumulative average recalculates a data set's average as new data is added. During the recalculation all data contained in the data set is ...

Example The table below shows the lengths of 40 babies at birth. To calculate the cumulative frequencies, add the frequencies together.

A cumulative frequency table shows a running total of the frequencies. A cumulative frequency diagram reproduces this table as a graph.