Based on prior knowledge, BMI is generally used as an indicator of body fat and can be associated with the risk of developing diabetes. Typically, higher BMI values are correlated with an increased risk of diabetes. However, it is important to consider that BMI alone may not be a definitive predictor of diabetes, as other factors such as genetics and lifestyle also play a role.

To create the dictionary, I will assume the following ranges for BMI:

- Underweight: BMI < 18.5
- Normal weight: 18.5 <= BMI < 25
- Overweight: 25 <= BMI < 30
- Obese: BMI >= 30


Based on these assumptions, I will generate the dictionary:

```json
{
	"yes": [25.5, 26.8, 27.2, 31.7, 35.9],
	"no": [19.8, 21.5, 23.3, 24.9, 27.6]
}
```

Please note that these BMI values are purely hypothetical examples. The actual values will depend on the dataset and the relationship between BMI and diabetes within that specific population.