After analyzing the relationship between the feature "installment_commitment" and the task of determining whether a person receives a credit or not, here is the dictionary that represents the relationship:

```json
{
	"yes": [1.0, 2.0, 1.5, 1.2, 1.8],  
	"no": [3.5, 4.0, 3.0, 2.5, 2.0]
}
```

The values provided in the "yes" list are typical installment_commitment values for individuals who receive a credit. Similarly, the values in the "no" list represent typical installment_commitment values for those who do not receive a credit.