Upon conducting a thorough analysis of the relationship between the feature ALT_BLOOD and the task of determining whether the patient shows chronic heart failure or not, we can use a general range of ALT_BLOOD values to differentiate between the two classes ('no' and 'yes'). Based on prior knowledge, typically, ALT_BLOOD values within a range of normal levels (0-50 IU/L) are considered normal, while values above this range may indicate potential liver damage or disease.

Here is the dictionary with typical ALT_BLOOD values for each target class:

```json
{
	"no": [10.5, 15.2, 20.1, 25.3, 30.7],
	"yes": [45.6, 55.2, 60.8, 70.4, 80.1]
}
```
Please note that these values are just examples and the actual cutoff points for normal and abnormal ALT_BLOOD levels may vary depending on specific medical guidelines or domain knowledge. It is recommended to consult with a medical professional for accurate interpretation and diagnosis.