```json
{
	"no": [0.0, 0.5, 1.0, 1.5, 2.0],
	"yes": [1.0, 2.0, 2.5, 3.0, 4.0]
}
```
In this case, the Oldpeak feature represents the ST depression, which is measured in depression units. The values for Oldpeak typically range between 0.0 and 4.0. 

Based on prior knowledge, for patients with no heart disease (target class 'no'), typical Oldpeak values may be 0.0, 0.5, 1.0, 1.5, and 2.0. These values indicate lower levels of ST depression.

For patients with heart disease (target class 'yes'), typical Oldpeak values may be 1.0, 2.0, 2.5, 3.0, and 4.0. These values indicate higher levels of ST depression, which may be associated with heart disease.

Please note that these are just example values and the actual relationship between Oldpeak and the presence of heart disease may vary depending on the specific dataset and analysis conducted.