Based on my prior knowledge, the number of doors in a car can have an influence on the decision to buy. Here is the analysis of the relationship between the "doors" feature and the "decision to buy" target:

- "Unacceptable": It is likely that a car with only 2 doors would be rated as unacceptable by some individuals who prioritize convenience and practicality. Therefore, the possible values of the "doors" feature for this class could be ['2'].

- "Acceptable": Cars with 3 doors can still be considered acceptable, especially for smaller vehicles where the rear seat access might not be a high priority. Possible values of the "doors" feature for this class could be ['3'].

- "Good": Cars with 4 doors are generally more practical and convenient for everyday use. They offer easier access to the rear seats. Possible values of the "doors" feature for this class could be ['4'].

- "Very Good": Cars with 5 doors or more are typically rated as very good in terms of their practicality and convenience. They offer better accessibility to the rear seats. Possible values of the "doors" feature for this class could be ['5more'].

Based on this analysis, I will create the dictionary with the specified format:

```json
{
  "unacceptable": ["2"],
  "acceptable": ["3"],
  "very good": ["5more"],
  "good": ["4"]
}
```