Based on the given feature description, LBXGLT represents the respondent's oral. To determine the appropriate ranges of values and their relationship to the target variable, we would need more context or information about the feature itself. Without that information, it is difficult to analyze the relationship between LBXGLT and the age group.

However, based on the task provided, we can assume that higher values of LBXGLT might be associated with the senior age group, and lower values might be associated with the non-senior age group. 

With this assumption, let's create a dictionary with 5 typical LBXGLT values for each target class:

```json
{
	"Adult": [20.1, 22.5, 18.7, 23.2, 19.9],
	"Senior": [28.4, 25.3, 30.2, 27.8, 26.1]
}
```

Please note that without more information and analysis of the actual relationship between LBXGLT and the age group, these values are just assumptions and may not accurately represent the true relationship.