Based on my prior knowledge, the duration feature could have a relationship with the task of whether a person receives credit or not. Generally, the duration of a credit can be an important factor in determining whether a person successfully pays off a loan or defaults on it.

To analyze the relationship between the duration feature and the target variable, we can look at the typical duration values for each target class ('yes' and 'no'). Here's an analysis of the relationship:

For the target class 'yes' (person receives credit):
- Typically, a duration of 6 months is common for credit receivers.
- Other common duration values for credit receivers include: 12 months, 18 months, 24 months, and 36 months.

For the target class 'no' (person does not receive credit):
- Typically, a duration of 24 months is common for those who do not receive credit.
- Other common duration values for non-receivers include: 30 months, 42 months, 48 months, and 60 months.

Based on this analysis, here's the dictionary with the specific details:

```json
{
	"yes": [6.0, 12.0, 18.0, 24.0, 36.0],
	"no": [24.0, 30.0, 42.0, 48.0, 60.0]
}
```