Based on the given feature description, the feature 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 feature PAQ605 and the target task of predicting the person's age group (Senior or non-senior), we can make some assumptions based on prior knowledge.

Assumptions:

1. It is likely that seniors are less engaged in moderate or vigorous-intensity physical activities compared to non-seniors.
2. Non-seniors might have a higher percentage of engagement in weekly moderate or vigorous-intensity physical activity.

Based on these assumptions, we can analyze the relationship between feature PAQ605 and the target task:

For the 'Adult' target class:
- PAQ605 values representing engagement in weekly moderate or vigorous-intensity physical activity could be in the range of 0.6 to 1.0.
- Sample PAQ605 values for 'Adult': [0.7, 0.9, 0.8, 0.6, 1.0]

For the 'Senior' target class:
- PAQ605 values representing lack of engagement in weekly moderate or vigorous-intensity physical activity could be in the range of 1.1 to 2.0.
- Sample PAQ605 values for 'Senior': [1.2, 1.3, 1.5, 1.1, 1.4]

Based on this analysis, the dictionary with the specified format can be generated:

```json
{
	"Adult": [0.7, 0.9, 0.8, 0.6, 1.0],
	"Senior": [1.2, 1.3, 1.5, 1.1, 1.4]
}
```