A group of ten athletes complete a desert ultramarathon. Medical researchers at the finish line record the core body temperature of each participant.
| Runner | Core body temperature (∘C^\circ\text{C}∘C) |
|---|---|
| 1 | 38.8 |
| 2 | 39.2 |
| 3 | 38.9 |
| 4 | 39.1 |
| 5 | 38.7 |
| 6 | 39.0 |
| 7 | 38.9 |
| 8 | 39.3 |
| 9 | 38.8 |
| 10 | 39.1 |
Calculate the mean core body temperature of the ten runners. Give your answer to 1 decimal place.
If a runner's core body temperature is strictly above 39.0∘C39.0^\circ\text{C}39.0∘C, they are classified as hyperthermic. What percentage of the runners would be classified as hyperthermic?