Based on prior knowledge, it is reasonable to assume that higher levels of education are generally associated with higher income. Therefore, individuals with higher levels of education, such as Masters or Doctorate, are more likely to earn more than 50000 dollars per year.

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

```json
{
	"no": ["11th", "HS-grad", "10th", "7th-8th", "11th", "5th-6th", "9th", "12th", "1st-4th", "Preschool"],  
	"yes": ["Assoc-acdm", "Some-college", "Prof-school", "Bachelors", "Masters", "Doctorate", "Assoc-voc"]  
}
```