Based on my prior knowledge, I can analyze the relationship between the feature "RIAGENDR" (Respondent's Gender) and the task of predicting the age group (Senior or non-senior).

Analysis:

- In this feature, 1 represents Male and 2 represents Female.
- Typically, adults are considered to be in the age group of 18 to 65, while seniors are usually considered to be 65 and older.
- Based on the general demographic distribution, it is expected that both males and females can be found in both age groups.

Dictionary:

Based on the analysis, the dictionary for the feature "RIAGENDR" and the target classes 'Adult' and 'Senior' is as follows:

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

Note that the dictionary includes five typical values as requested, with 'Adult' and 'Senior' having a mix of both genders represented by the values 1.0 and 2.0.