To analyze the relationship between the feature LBXGLU and the target age group, we need to understand how blood glucose levels typically differ between adults and seniors.

In general, blood glucose levels tend to increase with age, as seniors are more prone to conditions such as diabetes. However, the specific ranges can vary depending on various factors, including overall health and individual differences. 

To determine the appropriate ranges of values for each age group, we could consider the following general guidelines:

1. Adult age group: We could consider individuals between the ages of 18-64 as adults. For this range, normal fasting blood glucose levels are typically between 70-99 mg/dL (milligrams per deciliter). Therefore, we can assume that a range of 70-99 mg/dL would be indicative of the adult age group.

2. Senior age group: For seniors aged 65 and above, normal fasting blood glucose levels are slightly higher compared to adults, with a range of 80-130 mg/dL. Thus, we can assume that a range of 80-130 mg/dL would be indicative of the senior age group.

Based on these guidelines, we can now generate the requested dictionary as follows:

```json
{
	"Adult": [70.0, 80.0, 90.0, 95.0, 99.0],
	"Senior": [80.0, 90.0, 100.0, 120.0, 130.0]
}
```

Please note that these ranges are approximate and may not cover all possible values for each age group. Additionally, the specific cutoffs for the age groups may vary based on the context and dataset being analyzed.