```json
{
	"no": [70.0, 75.5, 80.2, 85.7, 90.3],
	"yes": [125.0, 130.9, 136.1, 141.6, 146.8]
}
```

Based on prior knowledge, a fasting blood sugar (FastingBS) value below 120 mg/dl is considered normal, while a value equal to or above 120 mg/dl is considered high. 

The dictionary includes typical FastingBS values for each target class ('no', 'yes'). For the 'no' class, the values are in the normal range (below 120 mg/dl), with examples such as 70.0, 75.5, 80.2, 85.7, and 90.3. For the 'yes' class, the values are high (equal to or above 120 mg/dl), with examples such as 125.0, 130.9, 136.1, 141.6, and 146.8. 

Please note that the specific values listed in the dictionary are just examples and may not represent actual data.