A cognitive psychologist wants to investigate whether ambient temperature affects fine motor coordination and problem-solving speed. They design a laboratory experiment to compare the time taken (in seconds) to fully assemble a 3D mechanical puzzle when working in a chilled room (16∘C16^{\circ}\text{C}16∘C) compared to a standard temperature room (21∘C21^{\circ}\text{C}21∘C).
Write a null hypothesis for 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.