Based on prior knowledge, it is known that high blood pressure is a risk factor for heart disease. Therefore, a higher resting blood pressure (RestingBP) may indicate a higher likelihood of heart disease.

To create the dictionary, we can first analyze the typical range of values for resting blood pressure and then select representative values for each target class.

Generally, normal resting blood pressure values range from 90/60 mm Hg to 120/80 mm Hg. However, it's important to consider individual variability and factors such as age, gender, and overall health.

Dictionary:
```json
{
  "no": [110.0, 112.5, 115.0, 117.5, 120.0],
  "yes": [130.0, 135.0, 140.0, 145.0, 150.0]
}
```

In the above dictionary, we selected 5 typical resting blood pressure values for each target class. The values for "no" class are within the normal range while the values for "yes" class are higher, indicating a potential heart disease diagnosis.