```json
{
	"no": [0.0, 2.0, 3.0, 5.0, 10.0],
	"yes": [15.0, 20.0, 25.0, 30.0, 40.0]
}
```
Based on prior knowledge and analysis, the feature "duration" is the last contact duration in seconds. To determine the appropriate range of values for this feature, we can consider the typical duration values for both classes, namely, "no" (client does not subscribe to a term deposit) and "yes" (client subscribes to a term deposit).

For the "no" class, the typical duration values could be in the range of [0.0, 10.0] seconds, with some examples being 0.0, 2.0, 3.0, 5.0, and 10.0 seconds.

For the "yes" class, the typical duration values could be in the range of [15.0, 40.0] seconds, with some examples being 15.0, 20.0, 25.0, 30.0, and 40.0 seconds.

Please note that these ranges are just approximations and might vary depending on the specific dataset and context.