An agricultural scientist is investigating the average sugar content of a new variety of sugar beet grown in a 10-hectare field. The scientist uses opportunity sampling, collecting 25 sugar beet plants from the edge of the field closest to the farm track.
Explain why random sampling would have been a better sampling technique for this investigation.
689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.