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Question
Draw a histogram for the following cumulative frequency table:
| Class interval | 0 - 10 | 10 - 20 | 20 - 30 | 30 - 40 | 40 - 50 |
| Cumulative frequency | 6 | 10 | 18 | 32 | 40 |
Solution
We first convert the cumulative frequency table to an exclusive frequency distribution table.
| Class interval | 0 - 10 | 10 - 20 | 20 - 30 | 30 - 40 | 40 - 50 |
| Frequency | 6 | 4 | 8 | 14 | 8 |
We take the class limits on the x-axis and the frequencies on the y-axis on suitable scales. We draw rectangles with the class intervals as bases and the corresponding frequencies as heights.
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