Mathematics for IGCSE & O level - Statistical Diagrams (Section 1 - No. 10)
When creating a cumulative frequency table, what is the correct way to calculate the cumulative frequency?
Subtracting each frequency from the previous cumulative frequency.
Multiplying each frequency by a constant.
Adding each frequency to the sum of the frequencies above it.
Finding the average of all frequencies.
คำอธิบาย
The cumulative frequency is calculated by summing the frequencies up to and including each class interval.