Based on the given feature description, LBXGLT is a numeric variable that represents the respondent's oral information. To determine the appropriate ranges of values, we need more information about the data and its distribution. However, we can still make an analysis based on prior knowledge of age groups and general understanding of typical LBXGLT values.

Analysis:
1. Adult age group: Typically, adults are considered to be between the ages of 18 and 64. Therefore, LBXGLT values for adults may belong to a wide range.
2. Senior age group: Seniors are generally considered to be 65 years and older. For seniors, LBXGLT values might be within a different range.

Based on the analysis, it is clear that without specific information about the data, it is difficult to determine the exact ranges for each age group. However, we can still generate a dictionary with some example values for each target class.

Dictionary:

```json
{
	"Adult": [1.5, 2.3, 3.9, 4.2, 5.6],
	"Senior": [4.8, 5.3, 6.7, 7.1, 8.2]
}
```

Please note that the provided example values are arbitrary and do not represent actual LBXGLT values for the given age groups.