Based on prior knowledge and analysis, the appropriate ranges of values for AST_BLOOD are as follows:

- For patients without chronic heart failure (target class 'no'), typical AST_BLOOD values could be in the range of 0-50.
- For patients with chronic heart failure (target class 'yes'), typical AST_BLOOD values could be in the range of 50-100.

Using these ranges, we can create a dictionary with the requested format:

```json
{
	"no": [10.0, 20.0, 30.0, 40.0, 50.0],
	"yes": [50.0, 60.0, 70.0, 80.0, 90.0]
}
```

Please note that these values are indicative and represent typical ranges, but individual patient data may vary.