Based on prior knowledge, we can determine the appropriate age ranges for classifying someone as a senior or non-senior. Let's assume that anyone aged 65 or above is considered a senior, and anyone below 65 is considered an adult/non-senior.

Here is the analysis of the relationship between the feature RIDAGEYR and the task of predicting age groups:

- Adult: RIDAGEYR values would typically range from 0 to 64 (excluding 65+).
- Senior: RIDAGEYR values would typically range from 65 and above.

Based on this analysis, the dictionary would be as follows:

```json
{
	"Adult": [0.0, 32.0, 45.0, 50.0, 64.0],
	"Senior": [65.0, 70.0, 75.0, 80.0, 90.0]
}
```

Please note that the provided RIDAGEYR values are just examples and may not be representative of the entire range of values.