Based on your task, we need to analyze the relationship between the feature "duration" and the target variable "Does this client subscribe to a term deposit?". Here's the analysis and the resulting dictionary:

1. Analyzing the relationship:
   - **Duration for 'no' (Did not subscribe to a term deposit):** Typically, clients who do not subscribe to a term deposit may have shorter durations.
   - **Duration for 'yes' (Subscribed to a term deposit):** Typically, clients who subscribe to a term deposit may have longer durations.

2. Creating the dictionary:
   
```json
{
	"no": [10.0, 15.5, 20.2, 12.8, 18.3],
	"yes": [35.7, 40.2, 38.1, 45.6, 50.0]
}
```

Please note that the duration values provided in the dictionary are examples and can be adjusted based on your dataset.