Descriptive Statisticsmedium
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A frequency table for customer ages:

| Age Class | Frequency | |---|---| | 15–25 | 6 | | 25–35 | 18 | | 35–45 | 12 | | 45–55 | 8 | | 55–65 | 4 |

For grouped data, the modal class is the interval with the highest frequency. What is the modal class?