Based on the feature description, the LBXGLT is a numeric variable that represents the respondent's oral. To determine the appropriate ranges of values for this feature, we need to consider the context of the task, which is predicting the age group of the person. However, without any additional information, it is difficult to determine the exact ranges for the LBXGLT values that correspond to different age groups.

To proceed, we can make some assumptions based on general knowledge. As the LBXGLT is an oral measurement, it could potentially be related to oral health or conditions. As people age, they may be more prone to oral health issues or wear-related conditions. Therefore, we can assume that higher LBXGLT values might be associated with the senior age group.

However, to perform a more accurate analysis, it would be helpful to have access to a dataset or more specific information about the LBXGLT feature.

Given the provided information, we can still create a dictionary with hypothetical values for the different age groups:

```json
{
	"Adult": [10.2, 15.8, 12.5, 11.3, 13.7],
	"Senior": [18.9, 20.1, 16.5, 19.2, 17.6]
}
```

Please note that these values are purely hypothetical and should not be considered as accurate representations without further context or data.