Based on prior knowledge, the feature "Recency" represents the number of months since a person's last blood donation. To determine the relationship between this feature and the task of whether the person donated blood or not, we can analyze the data.

This analysis could involve examining a dataset that includes the target variable indicating if a person donated blood or not, as well as the corresponding values for the "Recency" feature.

Based on this analysis, we can create a dictionary with the requested format:

```json
{
    "yes": [2.0, 4.0, 3.0, 11.0, 5.0],
    "no": [18.0, 14.0, 16.0, 23.0, 10.0]
}
```

Please note that the specific values provided above are hypothetical and should be replaced with actual values obtained from the analysis. These values represent typical examples of Recency values for each target class ('yes' and 'no').