A sports scientist wants to compare the effectiveness of two endurance training protocols, Protocol X X\,X and Protocol YYY, using a sample of 60 runners. They adopt an independent groups design where 30 runners will perform Protocol X X\,X and the other 30 will perform Protocol YYY.
Explain why the scientist should use random allocation to assign the runners to the two protocols.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 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.
