A student investigates the viscosity of a liquid by measuring the time taken, ttt, for a steel ball bearing to fall through a vertical column of the fluid. The student records five trials of the fall time:
| Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 |
|---|---|---|---|---|
| 1.42 s | 1.46 s | 1.85 s | 1.41 s | 1.43 s |
By identifying and omitting any anomalous results, what is the calculated mean fall time of the ball bearing?
1.14 s1.14\text{ s}1.14 s
1.43 s1.43\text{ s}1.43 s
1.44 s1.44\text{ s}1.44 s
1.51 s1.51\text{ s}1.51 s
44 exam-style questions on OCR GCSE Biology Practical skills. Each one has a worked solution and a mark scheme showing where the marks go.