The cumulative frequency table is shown below. The value of cumulative frequency is the sum of all previous frequencies. We should have 26 at the end of the table because all frequency add up to 26
To graph the cumulative frequency, we would need the plots.
Use the end of value range against the cumulative frequency value
Range 40-49, use the value 49 against the cumulative frequency 1
(49, 1)
(59, 3)
(69, 5)
(79, 12)
(89, 21)
(99, 26)
Plot these on graph and connect them as a curve
