To calculate cumulative frequency we add the first frequency to the second frequency then add the third frequency to the result and the process continues. The relative frequency is calculated by dividing the frequency by the total number or the total of all the frequencies. The decimal calculations are 026 added to 040 016 and 018 to equal one.
A cumulative frequency diagram is drawn by plotting the upper class boundary with the cumulative frequency.
Sort the data set. The sum of absolute frequencies of all the values equal to or less than the considered value. Sort the data set. A cumulative frequency diagram is drawn by plotting the upper class boundary with the cumulative frequency.