The next step after completing your Cumulative Frequency table is to draw a Cumulative Frequency Diagram; and the question that is most likely to come up is to find an estimate question. Below are two examples.

Example 1

Below is the Cumulative frequency table for the expenditure of 95 people on mobile phones.

Cumulative Frequency Diagram

Question: Estimate the number of people spending more than £30 on mobile phones

Approximately 40 people spend more than £30 on mobile phones

Example 2

Below is the cumulative frequency table for the monthly wages of 110 staff members in a department store.

Cumulative Frequency Diagram

Question: Estimate the number of people with earnings of £2000 or less

Approximately 85 members of staff earn £2000 or less
nth Term of a Linear Sequence
Similar Shapes - Area & Volume