**Analysis:**

To analyze the relationship between the feature "endocr_02" and the target variable (presence of chronic heart failure), we need to examine how the values of "endocr_02" are distributed among the target classes.

Based on prior knowledge, it is reasonable to assume that there may be a higher likelihood of chronic heart failure in patients who have a history of obesity (endocr_02 = 'yes'). Therefore, the presence of chronic heart failure is expected to be more likely when "endocr_02" is 'yes'.

**Dictionary:**

Based on the analysis, the dictionary will have the following format:

```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```

Explanation:
- The key "no" represents the absence of chronic heart failure.
- The key "yes" represents the presence of chronic heart failure.
- For the key "no", the only possible value for "endocr_02" is "no".
- For the key "yes", the only possible value for "endocr_02" is "yes".