Based on prior knowledge, analyzing the relationship between the ALT_BLOOD feature and the presence of chronic heart failure may require information about the reference range values for Serum Alanine Aminotransferase (ALT) content. The normal range for ALT levels in healthy individuals is typically between 7 to 55 units per liter (U/L) for men and 7 to 45 U/L for women.

To determine the appropriate ranges of values specific to chronic heart failure, additional domain expertise or a dataset that includes ALT_BLOOD values for patients with known heart failure would be necessary. In the absence of such information, let's assume that ALT_BLOOD values below the normal range (less than 7 U/L) represent a potential indicator of chronic heart failure.

Based on this assumption, we can generate a dictionary with typical ALT_BLOOD values for each target class:

```json
{
    "no": [10.5, 15.2, 20.1, 22.3, 17.6],
    "yes": [5.8, 4.9, 6.2, 7.1, 6.7]
}
```

These values are just examples and would need to be validated with domain expertise and/or real data to ensure accuracy.