Based on prior knowledge, the body mass index (BMI) is a commonly used measure of body fat based on an individual's weight and height. Higher BMI values are generally associated with an increased risk of developing diabetes.

To analyze the relationship between BMI and the presence of diabetes, we can consider typical BMI values for both the "yes" (person has diabetes) and "no" (person does not have diabetes) target classes. Here is the requested dictionary:

```json
{
	"yes": [25.0, 30.5, 35.2, 40.0, 45.8],
	"no": [21.3, 23.7, 26.1, 28.4, 31.0]
}
```

These values are examples and represent typical BMI values for each target class. Please note that the specified float values are arbitrary and should not be considered precise thresholds for determining the presence or absence of diabetes.