Based on prior knowledge, there can be some general observations about the relationship between insulin levels and the likelihood of having diabetes:

1. Higher insulin levels: Typically, individuals with diabetes tend to have higher insulin levels as their bodies may develop insulin resistance or produce insufficient insulin.
2. Lower insulin levels: Low insulin levels could indicate a lack of insulin production, which might be a sign of diabetes, especially for cases like type 1 diabetes or advanced stages of type 2 diabetes.

Now, let's create a dictionary showcasing the typical insulin values for each target class:

```json
{
	"yes": [25.3, 45.1, 50.2, 65.8, 70.9],
	"no": [7.2, 11.6, 15.4, 20.8, 30.5]
}
```

Please note that the insulin values provided above are arbitrary and used as examples. The actual values may vary depending on the specific dataset or domain.