Dr Vance conducted an investigation to determine whether a new mindfulness training programme reduces self-reported anxiety severity (measured on an ordinal rating scale from 0 to 50) in emergency call handlers. The anxiety levels of 15 call handlers were assessed both before and after completing the 4-week programme. Dr Vance selected a Wilcoxon signed-ranks test to analyse the data.
State three reasons why Dr Vance would use a Wilcoxon signed-ranks 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.