Dr Aris conducted a statistical investigation into the relationship between daily screen time and sleep quality among young adults. He obtained his sample by selecting an opportunity sample of 65 attendees queuing outside a video game convention.
Explain one improvement that could be made to Dr Aris's method of choosing his participants.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.