Analysis:

To determine the relationship between the feature ALT_BLOOD and the presence of chronic heart failure, or the target variable, we need to consider the typical ranges of ALT_BLOOD values for patients with and without chronic heart failure.

Based on prior domain knowledge, ALT_BLOOD values within the normal range are typically below 40 units per liter (U/L). Values above this range may indicate liver injury or other conditions. It's important to note that while elevated ALT_BLOOD values can be associated with liver problems, they may not necessarily indicate chronic heart failure.

Considering the task at hand, we can analyze the relationship between ALT_BLOOD and chronic heart failure by comparing typical ALT_BLOOD values for patients with and without the condition.

Dictionary:

```json
{
    "no": [10.0, 20.0, 30.0, 35.0, 38.0],
    "yes": [40.0, 50.0, 55.0, 60.0, 65.0]
}
```

In the dictionary provided above, five typical ALT_BLOOD values are presented for each target class. For the class "no" (indicating no chronic heart failure), the values range from 10.0 to 38.0, all within the normal range. For the class "yes" (indicating chronic heart failure), the values range from 40.0 to 65.0, with values above the normal range, indicating possible liver injury or other conditions.