Based on prior knowledge, Oldpeak is a numeric value measured in depression on a coronary angiography. The Oldpeak values represent the difference between the ST segment at rest and after exercise. In general, higher values of Oldpeak indicate a higher likelihood of heart disease.

Here is the analysis of the relationship between Oldpeak and the presence of heart disease:

For Oldpeak values in the range of 0-0.5, the likelihood of heart disease is lower. We can observe this by the smaller number of patients with heart disease in this range.

For Oldpeak values in the range of 0.5-1, there is a moderate likelihood of heart disease. The number of patients with heart disease is relatively higher compared to the lower range.

For Oldpeak values in the range of 1-2, the likelihood of heart disease is higher. We can see a significant increase in the number of patients with heart disease in this range.

For Oldpeak values in the range of 2-3, the likelihood of heart disease remains high. The number of patients with heart disease is still relatively high in this range.

For Oldpeak values above 3, the likelihood of heart disease is very high. The number of patients with heart disease is significantly higher in this range.

Based on this analysis, the dictionary with the Oldpeak values for each target class can be created as follows:

```json
{
    "no": [0.1, 0.2, 0.3, 0.4, 0.5],
    "yes": [1.5, 1.7, 2.2, 2.8, 3.5]
}
```