Based on prior knowledge, the appropriate ranges of blood insulin levels for seniors and non-seniors can be defined as follows:

- Senior: Blood insulin levels above a certain threshold indicate a higher likelihood of being a senior. Let's assume this threshold to be 30.
- Non-Senior: Blood insulin levels below the threshold of 30 indicate a higher likelihood of being a non-senior.

Based on this analysis, the dictionary can be generated as follows:

```json
{
	"Adult": [10.2, 8.5, 14.1, 12.9, 11.7],
	"Senior": [40.2, 35.7, 32.1, 37.5, 41.0]
}
```

These are just example values and may differ depending on the dataset and the specific context in which the analysis is being performed.