To analyze the relationship between the feature AST_BLOOD and the task of identifying chronic heart failure, we need to consider the typical ranges of AST_BLOOD values for patients with and without chronic heart failure. Unfortunately, the given feature description does not provide specific information about the appropriate ranges of values for AST_BLOOD in relation to chronic heart failure.

To proceed with the analysis, we will assume that higher AST_BLOOD values indicate a higher likelihood of chronic heart failure. We will use this assumption to generate a dictionary with typical AST_BLOOD values for the target classes 'no' (no chronic heart failure) and 'yes' (chronic heart failure):

```json
{
	"no": [15.2, 17.3, 19.1, 14.8, 16.5],
	"yes": [20.7, 22.4, 21.9, 19.8, 18.5]
}
```

Please note that the provided values are arbitrary and should not be considered as accurate findings. Without specific information about the ranges of AST_BLOOD values in relation to chronic heart failure, it is difficult to draw meaningful conclusions. It is recommended to consult domain experts or access relevant medical literature to determine the appropriate ranges for AST_BLOOD in the context of chronic heart failure.