```json
{
	"yes": [12.0, 18.0, 24.0, 30.0, 36.0],
	"no": [6.0, 9.0, 48.0, 60.0, 72.0]
}
```

Based on prior knowledge and analysis, the feature "duration" represents the duration of a credit in months. By analyzing the relationship between the duration and the task of whether a person receives credit or not, we can identify typical duration values for each target class.

For the "yes" target class, which represents people who do receive credit, typical duration values include 12.0 months, 18.0 months, 24.0 months, 30.0 months, and 36.0 months.

For the "no" target class, which represents people who do not receive credit, typical duration values include 6.0 months, 9.0 months, 48.0 months, 60.0 months, and 72.0 months.