Cumulative Frequency
Maths: Edexcel IGCSE Higher, topic 6.2.3
Cumulative Frequency
Example data
- To find the cumulative frequency, add together all the frequencies below that value.
Cumulative frequency graph
Plotting the graph
- Plot cumulative frequency against the upper limit of each class interval.
- Add a point with frequency 0 at the lowest class bound.
- Join the points with a smooth curve or straight line segments.
Cumulative Frequency - Estimations
Estimate the value of the 60th person
Estimate the value of the 60th person
- Draw a line from 60 on the y-axis until it hits the curve.
- Then draw a vertical line down to the x-axis.
- The number on the x-axis is an estimate for the 60th value. Here it is roughly 32kg.
Test yourself on Cumulative Frequency
Consider the frequency table below. The cumulative frequency column is not completed. What is the value x?
Consider the frequency table below. The cumulative frequency column is not completed. What is the value x?
Consider the frequency table below. The cumulative frequency column is not completed. What is the value x?
Consider the frequency table below. The cumulative frequency column is not completed. What is the value x?
Consider the frequency table below. The cumulative frequency column is not completed. What is the value x?