```json
{
    "no": [1, 2, 3, 4, 5], 
    "yes": [9, 12, 13, 14, 15]
}
```

Based on the analysis, the feature "educational-num" has a strong relationship with the target variable. Typically, individuals with lower educational-num values (1-5) are more likely to earn less than 50000 dollars per year ("no" class), while those with higher educational-num values (9-15) are more likely to earn more than 50000 dollars per year ("yes" class).