At the end of an experimental study, a sports psychologist used a sign test to see if the reaction times of tennis players were faster, slower, or stayed the same after drinking a newly formulated energy juice compared to before they drank it.
Explain why the sports psychologist decided that the sign test was an appropriate statistical test to use on the data from this study.
Practise AQA A Level Psychology Inferential testing (A-level only) with exam-style questions for A Level Psychology. 123 questions, matched to the AQA A Level Psychology (7182) 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.
