Based on prior knowledge, the feature "educational-num" can be used to estimate a person's educational attainment. Generally, higher levels of education are associated with higher earning potential. Let's analyze the relationship between "educational-num" and the task of whether a person earns more than 50000 dollars per year.

Here are some typical values of "educational-num" for each target class ('no', 'yes'):

```json
{
	"no": [1, 2, 3, 4, 5],
	"yes": [9, 10, 11, 12, 13]
}
```

Explanation:
- For the target class 'no' (earning less than or equal to 50000 dollars per year), the typical values of "educational-num" tend to be lower. For example, values from 1 to 5 (corresponding to education levels such as Preschool, 1st-4th grade, 5th-6th grade, 7th-8th grade, and 9th grade respectively) are often associated with lower incomes.
- For the target class 'yes' (earning more than 50000 dollars per year), the typical values of "educational-num" tend to be higher. For example, values from 9 to 13 (corresponding to education levels such as HS-grad, Some-college, Associate, Bachelors, and Masters respectively) are often associated with higher incomes.

Please note that these are just typical values based on general trends, and individual cases may deviate from these patterns.