Concept explainers
To design an experiment.
Explanation of Solution
This needs to be double blind experiment in which 1 factor at 2 levels. The levels are vitamin E and no vitamin E which will be 2 treatments. The response variable is the time it takes the patient to recover from the surgery. Therefore, first need to randomly select half of the patients who agree to the study to get large doses of vitamin E after the surgery. The other need a placebo pill. Now assume that doctor is unaware that which patient having placebo and which have given vitamin E. Therefore, compare the groups which takes number of required days to recover.
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