An agricultural scientist is conducting an investigation into the effect of a new organic fertilizer on the average crop yield of heirloom tomato plants. Since extensive pilot studies and established botanical theory indicate that this fertilizer increases crop yield, the scientist formulates a directional hypothesis.
Explain why a directional hypothesis is appropriate 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.
