A psychologist investigates whether there is a significant difference in self-reported anxiety ratings (on a scale of 1 to 10) before and after a brief meditation exercise in a sample of 20 participants. Which of the following inferential statistical tests is the most appropriate to analyse the results of this study?
Wilcoxon Signed Ranks test
Mann-Whitney U test
Related t-test
Sign test
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.