An ecological study on the prevalence of ash dieback in a large managed forest is criticised for using opportunity sampling, as researchers only sampled ash trees within 10 metres of the main access road.
Explain how the researchers could use an alternative sampling technique to select a sample of ash trees for this study.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
