Based on the given feature description, the feature PAQ605 represents the respondent's engagement 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 the feature and the target task of predicting the person's age group (senior or non-senior), we can consider the following assumptions and prior knowledge:

1. In general, seniors may have reduced participation in moderate or vigorous-intensity physical activities compared to adults. Therefore, we might expect a higher proportion of value 2 for PAQ605 in the senior age group.
2. However, it is still possible for some seniors to engage in regular physical activities, so we may also see a range of values for PAQ605 in the senior age group.

Based on these assumptions, let's create the dictionary:

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

In the "Adult" class, we can see five typical values of 1.0 for feature PAQ605, indicating regular participation in moderate or vigorous-intensity physical activities. In the "Senior" class, we can see a combination of values 2.0 and 1.0, reflecting both reduced participation and continued engagement in physical activities.

Please note that the provided values in the dictionary are for demonstration purposes and can be adjusted based on real data analysis.