To analyze the relationship between the feature PAQ605 and the target variable (age group), we can assume that seniors are less likely to engage in moderate or vigorous-intensity physical activities compared to non-seniors. Based on this assumption, we can analyze the distribution of PAQ605 values for each target class.

Here is the dictionary with the possible values of feature PAQ605 for each target class:

```json
{
	"Adult": [1.0, 1.0, 1.0, 2.0, 2.0],  
	"Senior": [2.0, 2.0, 2.0, 2.0, 2.0]
}
```

In this dictionary, the key "Adult" represents the target class of non-senior individuals and the key "Senior" represents the target class of senior individuals. The values within each key represent the possible values of feature PAQ605 for the respective target class.

Based on the given information, it appears that non-seniors (adults) are more likely to engage in moderate or vigorous-intensity physical activities, as indicated by the presence of "1.0" values for feature PAQ605 in the "Adult" key. On the other hand, seniors are less likely to engage in such activities, as all the values for feature PAQ605 in the "Senior" key are "2.0."

Please note that this analysis is based on assumptions and prior knowledge about the relationship between age group and engagement in physical activities.