A sports scientist wants to investigate whether wearing compression garments during and after a marathon affects post-exercise recovery. A wealth of previous research in sports physiology has consistently shown that compression garments significantly lower blood lactate concentration 24 hours post-exercise.
The scientist uses an independent groups design with 50 marathon runners:
After 24 hours, the blood lactate concentration (measured in mmol/L\text{mmol/L}mmol/L) of each runner is recorded.
Based on the scientific standard for hypothesis selection, which of the of the following types of hypothesis is least appropriate for the scientist to formulate for this study?
Null hypothesis
Directional hypothesis
One-tailed hypothesis
Non-directional hypothesis
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.
