A psychologist measures the recall scores of a group of participants in a memory test. One participant scores extremely low due to sudden fatigue, while the remaining participants score very consistently.
Explain why the standard deviation would be a more appropriate measure of dispersion than the range for this study.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, matched to the Edexcel A Level Psychology (9PS0) 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.