Based on prior knowledge, the relationship between SkinThickness and the task of whether a person has diabetes or not can be analyzed as follows:

SkinThickness is considered as one of the factors that can contribute to the risk of diabetes. Higher skin thickness can be associated with insulin resistance, which is a common characteristic of diabetes. However, it is important to note that skin thickness alone is not a definitive indicator of diabetes. Other factors such as insulin levels, blood sugar levels, family history, and overall health should also be taken into consideration for a proper diagnosis.

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

```json
{
	"yes": [40.0, 30.0, 35.0, 50.0, 45.0],
	"no": [20.0, 25.0, 15.0, 10.0, 18.0]
}
```

Please note that the above values are examples and may not represent the actual range of SkinThickness values for each target class. It is recommended to consult domain experts or perform further analysis on a specific dataset to generate accurate values.