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.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.