# Cumulative Frequency Histogram

How to draw a cumulative frequency histogram from the given data: example and its solution.

## Example

Make a 'Cumulative Frequency' column

next to the 'Frequency' column.

Start from the bottom frequency: 2.

Write the values as

(previous value) + (the next frequency).

2 + 3 = 5

5 + 7 = 12

12 + 6 = 18

18 + 2 = 20

Draw the histogram form.

Vertical axis: Cumulative Frequency (0 ~ 20)

Horizontal axis: Test Scores (50-59 ~ 90-99)

Draw the vertical bars

that show each interval's cumulative frequency.