To analyze the relationship between the feature ALT_BLOOD and the task of determining if the patient shows chronic heart failure, we need to consider the available data and any prior knowledge regarding ALT_BLOOD values in relation to chronic heart failure.

In general, ALT (Alanine Aminotransferase) is an enzyme found primarily in the liver and low levels are considered normal. Higher levels of ALT in the blood could indicate liver damage or injury. However, ALT levels alone are not specific to chronic heart failure and can be influenced by various factors.

To proceed with the analysis, we will assume that higher ALT_BLOOD values may be indicative of chronic heart failure.

Here is a dictionary containing the ALT_BLOOD values for the target classes 'no' and 'yes':

```json
{
	"no": [15.5, 17.2, 14.8, 20.3, 18.1],
	"yes": [25.9, 22.6, 28.7, 24.1, 26.8]
}
```

Please note that these values are hypothetical and for illustrative purposes only. The actual values may vary depending on the dataset being analyzed. It is important to consult domain experts and refer to available literature to determine the appropriate ranges of ALT_BLOOD values for chronic heart failure.