An environmental scientist wants to investigate whether the concentration of dissolved oxygen in a river downstream from a water treatment plant is different from the concentration of dissolved oxygen upstream. They plan to collect water samples from both locations (upstream and downstream) at identical times over a period of 20 days.
State a non-directional hypothesis for this investigation.
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.
