To determine the relationship between the feature ALT_BLOOD and the presence of chronic heart failure (target variable), it is important to consider the normal range of ALT (Alanine Aminotransferase) levels in the blood and how they correlate with the development of chronic heart failure.

ALT is an enzyme found predominantly in the liver, and elevated ALT levels in the blood suggest liver damage or disease. However, ALT levels can also be influenced by heart-related conditions. In the context of chronic heart failure, elevated ALT levels may indicate liver congestion due to right-sided heart failure.

Based on prior knowledge and assuming lower ALT levels as within the normal range, values higher than the upper limit may be indicative of liver damage associated with chronic heart failure. Therefore, by analyzing the ALT_BLOOD feature, we can observe how the values relate to the occurrence of chronic heart failure.

Now, let's proceed to create the dictionary by considering typical ALT_BLOOD values for each target class:

```json
{
	"no": [15.5, 20.3, 17.9, 13.2, 18.6],
	"yes": [35.1, 39.7, 33.5, 28.9, 36.4]
}
```

Please note that these values are for illustrative purposes and may not be accurate representations of the relationship between ALT_BLOOD and chronic heart failure in reality.