An agricultural researcher wants to investigate whether applying a new organic seaweed extract spray to tomato crops affects the dry mass yield of the harvested fruit at a commercial nursery called 'Verdant Harvest', which grows 500 plants across 3 polytunnels.
Identify the dependent variable in this study.
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.