A town conducted a survey of 300 randomly selected residents about their preferred local park. The results are summarized in the table below.
| Park Preference | Frequency |
|---|---|
| Oakwood Park | 120 |
| Maple Grove Park | 90 |
| Pine Ridge Park | 60 |
| No Preference | 30 |
If the total population of the town is 25,000, based on the sample data, what is the best estimate, in thousands, of the difference between the number of residents who prefer Oakwood Park and the number of residents who prefer Pine Ridge Park? (Round your answer to the nearest tenth of a thousand.)
