Mode (Grouped Data)
Modal class: The class that has the greatest frequency.
The mode is the most common value. However, people cannot find an exact value for the mode of grouped data, but they can determine the modal class. The modal class is the class that has the greatest frequency.
Identify the modal class of the grouped data below. In this example, the modal class is 15 to 18.99.
| Time (in seconds) | Frequency f | Cumulative Frequency cf |
| 15–18.99 | 7 | 7 |
| 19–22.99 | 6 | 13 |
| 23–26.99 | 3 | 16 |
| 27–30.99 | 3 | 19 |
| 31–34.99 | 5 | 24 |
| Total | `Σf = 24` |
