Based on the given feature description, PAQ605 represents whether the respondent engages in moderate or vigorous-intensity sports, fitness, or recreational activities in a 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 make some assumptions based on prior knowledge. It is likely that seniors engage in less physical activity compared to non-seniors. Therefore, we would expect to see more respondents with a value of 1 (indicating engagement in physical activity) in the non-senior age group compared to the senior age group.

Now, let's create the dictionary with possible values of PAQ605 for each age group:

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

Please note that this dictionary assumes that a value of 1 represents the non-senior age group (Adult) and a value of 2 represents the senior age group (Senior). The values in the lists are just placeholders for the required format, and in reality, the distribution of values may vary.