Amara conducted a study to investigate whether there is a difference in social cooperation scores (measured on an ordinal scale from 1 to 10) between children who attend daycare and those who do not. She chose to use a Mann-Whitney U test to analyse her data.
State three reasons why Amara would use a Mann-Whitney U test for this study.
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.