Amara carried out some research into the effects of outdoor play on children's cooperative behaviour. She rated their cooperative play on a scale of 1 to 10. The children who had daily outdoor play had a mean rating score of 8.2. The children who had indoor-only play had a mean rating score of 5.1.
State which non-parametric statistical test Amara should use to analyse her data.
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.