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Calculate the class interval of the required class.
Class | \(1\) | \(2\) | \(3\) | \(4\) | \(5\) |
Interval | 5.6 - 12 | 12 - 21.9 | 21.9 - 38.6 | 38.6 - 49.8 | 49.8 - 59.4 |
The class interval of class \(4\) is .
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