Based on prior knowledge, the feature "Oldpeak" refers to the ST depression induced by exercise relative to rest on an electrocardiogram (ECG). In the context of coronary angiography, a higher value of Oldpeak generally indicates a higher degree of coronary artery disease. However, it is important to note that the specific ranges for Oldpeak values may vary depending on the dataset or study.

To analyze the relationship between the feature "Oldpeak" and the task of determining whether the coronary angiography shows heart disease, we can examine the distribution of Oldpeak values for each target class (yes or no).

Here is the requested dictionary containing the Oldpeak values for each target class:

```json
{
	"no": [0.0, 0.5, 1.0, 1.5, 2.0],
	"yes": [2.5, 3.0, 3.5, 4.0, 4.5]
}
```

Please note that these values are just examples and should not be considered definitive. The actual ranges and typical values of Oldpeak may differ depending on the dataset and the population being studied.