An investigator measured the reaction times of five sleep-deprived taxi drivers during a simulated emergency braking test. The reaction times, measured in seconds (s), are recorded in the table below:
| Participant | Reaction time (s) |
|---|---|
| Participant P | 0.62 |
| Participant Q | 0.45 |
| Participant R | 0.81 |
| Participant S | 0.58 |
| Participant T | 0.51 |
State the mathematical term used to describe the reaction time value obtained for Participant S.
