Based on prior knowledge, diastolic blood pressure can be an important factor in determining chronic heart failure. Typically, higher values of diastolic blood pressure may indicate an increased risk of chronic heart failure. However, there is no specific range of values provided for this feature in the task description. Therefore, we will assume that higher values of diastolic blood pressure are associated with chronic heart failure.

To complete the analysis, it would be helpful to have access to the dataset and examine the distribution of diastolic blood pressure values for patients with and without chronic heart failure. Without the actual dataset, it is not possible to determine the exact ranges or specific values of diastolic blood pressure associated with the target classes.

However, as requested, I will provide a sample dictionary containing typical diastolic blood pressure values for each target class:

```json
{
	"no": [60.5, 65.2, 68.7, 72.1, 75.8],  
	"yes": [80.3, 85.6, 90.2, 92.9, 98.1] 
}
```

Please note that the values provided are just examples and may not accurately represent a real dataset.