Based on prior knowledge, I will analyze the relationship between the feature ALT_BLOOD and the task of determining whether the patient has chronic heart failure.

Since ALT_BLOOD represents the serum AlAT content, it is important to consider the normal range of AlAT levels in order to determine the appropriate ranges of values. The normal range for ALT levels in adults is typically between 7-55 units per liter (U/L) for men and 7-45 U/L for women.

To analyze the relationship between ALT_BLOOD and chronic heart failure, we can examine the ALT_BLOOD values for patients with and without chronic heart failure. By comparing the ALT_BLOOD values for each group, we can determine if there are any notable differences or patterns.

Based on this analysis, the dictionary with the possible ALT_BLOOD values for each target class ('no' and 'yes') can be generated as follows:

```json
{
	"no": [10.5, 15, 20.3, 25, 30.2],  
	"yes": [30, 35.1, 40.5, 45, 50.8]
}
```

Please note that the provided ALT_BLOOD values in the dictionary are just examples and not actual values. It is important to conduct a comprehensive analysis of the actual data to determine the appropriate ranges and typical values for ALT_BLOOD in relation to chronic heart failure.