A researcher investigated whether a new mindfulness app reduces stress. Rating scales of 1 to 10 were completed by participants before using the app, and again after using the app for two weeks. Which of the following would be the appropriate inferential test to use to analyse the data from this study?
Chi-square
Mann-Whitney U
Wilcoxon Signed Ranks test
Related ttt-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.