AST_BLOOD is a numeric variable that represents the Serum Aspartate Aminotransferase (AST) content. Typically, higher levels of AST indicate liver or heart damage. To determine the appropriate ranges of AST_BLOOD values, we can use the normal reference range of AST, which is 8-48 U/L for males and 7-34 U/L for females.

Analyzing the relationship between AST_BLOOD and the presence of chronic heart failure (target variable), we can hypothesize that patients with chronic heart failure may have higher AST_BLOOD values due to heart muscle damage.

Based on this analysis, let's create the dictionary:

```json
{
	"no": [15.0, 20.5, 25.2, 28.9, 30.1],
	"yes": [35.6, 40.3, 45.0, 47.8, 50.2]
}
```

In the "no" class, which represents patients without chronic heart failure complications, we have selected 5 typical AST_BLOOD values within the normal reference range, such as 15.0, 20.5, 25.2, 28.9, and 30.1.

In the "yes" class, which represents patients with chronic heart failure complications, we have selected 5 typical AST_BLOOD values that are slightly elevated or at the upper end of the normal reference range, such as 35.6, 40.3, 45.0, 47.8, and 50.2.

Keep in mind that these values are just examples and may vary based on the specific dataset and analysis.