A researcher wants to test whether drinking coffee affects scores graduate stude

Question

A researcher wants to test whether drinking coffee affects scores graduate students achieve in a test of mathematical ability performed an hour later. Thirty volunteers are available for the study. What are the explanatory and response variables in this study? Design a completely randomised experiment for this study, in which each volunteer completes the test once only. Comment on elements of control, randomisation and replication in your design. Your answer should include a schematic diagram or flow chart. Say what comparisons you would make at the end of the experiment.

Explanation / Answer

Explanatory Variable Drinking Coffee

Response Variable Scores graduate students achieve in a mathematical ability test.

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