A cumulative frequency diagram reproduces this table as a graph. The table below shows the lengths of 40 babies at birth. To calculate the cumulative frequencies, add the frequencies together.

Contingency Table: a table/matrix that displays the frequencies of the observations with same values for two variables. Also called a two-way table. Cumulative Frequency Distribution : for each value, ...

A cumulative frequency diagram is drawn by plotting the upper class boundary with the cumulative frequency. The upper class boundaries for this table are 35, 40, 45, 50 and 55.