A student measures their reaction time by catching a falling ruler.
The table shows the distance the ruler fell before the student caught it.
Table
| Attempt | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Distance ruler fell in cm | 15 | 14 | 27 | 13 | 14 |
The student ignores the anomalous result.
What is the mean distance the ruler fell, in cm?
13.513.513.5
14.014.014.0
16.616.616.6
20.820.820.8
135 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.