The relationship between the feature "BloodPressure" and the task of determining whether a person has diabetes or not can be analyzed by considering the typical ranges of diastolic blood pressure for individuals with and without diabetes.

Based on prior knowledge, here are the typical ranges for diastolic blood pressure:

- Normal blood pressure range: 60-80 mm Hg
- Prehypertension range: 80-89 mm Hg
- Stage 1 hypertension range: 90-99 mm Hg
- Stage 2 hypertension range: 100-109 mm Hg
- Stage 3 hypertension range: >=110 mm Hg

To create a dictionary with typical values of "BloodPressure" for each target class, we can map the "yes" class to individuals with diabetes and the "no" class to individuals without diabetes.

```json
{
  "yes": [70.0, 85.0, 92.0, 100.0, 108.0],
  "no": [75.0, 82.0, 88.0, 95.0, 102.0]
}
```

In this dictionary, the "yes" class represents individuals with diabetes and the "no" class represents individuals without diabetes. The "BloodPressure" values are provided as floats for each target class, with five typical values for each class.