From prior knowledge, we can analyze the relationship between the maximum heart rate achieved (MaxHR) and the occurrence of heart disease.

Typically, a higher maximum heart rate achieved is associated with a healthy heart, while a lower maximum heart rate achieved can be an indication of a heart disease or some underlying condition.

Based on this analysis, we can create a dictionary showcasing the possible values of MaxHR for each target class:

```json
{
	"no": [100.0, 105.0, 110.0, 115.0, 120.0],
	"yes": [80.0, 85.0, 90.0, 95.0, 98.0]
}
```

In this dictionary, we include 5 typical MaxHR values for each target class ['no', 'yes']. This provides a snapshot of potential MaxHR values that may be associated with the absence or presence of heart disease.