Based on prior knowledge, the level of insulin in the blood can be used as an indicator to determine whether a person has diabetes or not. Generally, individuals with diabetes tend to have higher levels of insulin, whereas those without diabetes have lower levels. 

To generate the dictionary, I will analyze the relationship between the feature "Insulin" and the target variable "Does this person have diabetes?" by considering typical values for each class.

```json
{
	"yes": [25.0, 55.0, 100.0, 160.0, 250.0],
	"no": [4.0, 8.0, 12.0, 18.0, 22.0]
}
```

In this case, the "yes" class represents individuals with diabetes, and the "no" class represents those without diabetes. The dictionary above includes 5 typical insulin values for each class. For the "yes" class, the insulin values range from 25.0 to 250.0, whereas for the "no" class, the insulin values range from 4.0 to 22.0.