A student investigated the time taken for a person to say ‘now’ after feeling a vibration on their wrist.
The table shows the results.
| Trial | Response time in s\text{s}s |
|---|---|
| 1 | 0.28 |
| 2 | 0.31 |
| 3 | 0.29 |
| 4 | 0.34 |
| 5 | 0.33 |
Calculate the mean response time.
111 exam-style questions on Edexcel GCSE Biology 2.3 The nervous system and brain, covering 2.3.1 Structures and functions of the brain, 2.3.2 Imaging brain function with scanning, 2.3.3 Limitations in treating nervous system damage, 2.3.4 Neurones and impulse transmission, and 2.3.5 Structure and function of a reflex arc. Each one has a worked solution and a mark scheme showing where the marks go.