Based on my analysis, the RestingBP feature can provide useful information to determine whether a patient shows a heart disease or not. Generally, higher blood pressure values are associated with a higher risk of heart disease. However, it is important to note that specific normal and abnormal ranges for RestingBP can vary depending on factors such as age, sex, and overall health. 

With this information in mind, I will provide a dictionary with example values for the RestingBP feature for each target class:

```json
{
    "no": [120.0, 118.0, 123.0, 115.0, 121.0],
    "yes": [140.0, 135.0, 150.0, 155.0, 160.0]
}
```

Please note that these values are just examples and may not represent the actual data. The provided values for the "no" class are within a normal range, while the values for the "yes" class are higher, indicating a potentially higher risk of heart disease.