Which level of measurement and experimental design are required for a researcher to use the Mann-Whitney U U\,U test?
Nominal level of measurement and a repeated measures design
Ordinal level of measurement and an independent groups design
Ordinal level of measurement and a repeated measures design
Nominal level of measurement and an independent groups design
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.