Based on prior knowledge, high levels of serum cholesterol are usually associated with an increased risk of heart disease. 

Here is the dictionary with the analysis:

```json
{
    "no": [130.0, 150.0, 160.0, 170.0, 180.0],
    "yes": [200.0, 220.0, 230.0, 250.0, 280.0]
}
```

In this case, lower cholesterol levels (130.0 to 180.0 mm/dl) are typical for patients without heart disease (target class "no"), while higher cholesterol levels (200.0 to 280.0 mm/dl) are more common in patients with heart disease (target class "yes").