Based on the feature description, PAQ605 represents whether the respondent engages in moderate or vigorous-intensity sports, fitness, or recreational activities in the typical week. A value of 1 indicates that the respondent takes part in weekly moderate or vigorous-intensity physical activity, while a value of 2 indicates that they do not.

To analyze the relationship between PAQ605 and the age group, we can hypothesize that older adults (seniors) might be less likely to engage in regular moderate or vigorous-intensity physical activity compared to younger adults (non-seniors). 

Based on this hypothesis, we can assume the following relationship:
- Seniors (target class 'Senior') are more likely to have higher PAQ605 values (1 indicating regular physical activity) than non-seniors (target class 'Adult').

Let's create the dictionary with PAQ605 values for each target class:

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

In the 'Adult' category, we have selected 5 typical values of 2.0 to indicate that they do not engage in weekly moderate or vigorous-intensity physical activity. In the 'Senior' category, we have selected 5 typical values of 1.0 to indicate that they engage in weekly moderate or vigorous-intensity physical activity. Please note that these values are hypothetical and may not represent the actual data.