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I am running an experiment to determine the best performing of 5 systems, labeled A-E. I plan on running pairwise comparisons, e.g. is A better than B, A vs C, etc.? For the sake of argument, we can assume that participant responses follow a normal distribution.

I realize this is essentially a question about statistical power, but I'm not sure how to apply the criteria above either to the R package pwr, or the statistical software G Power. I did read through this question but couldn't figure out how to apply it to my circumstances.

Any assistance as to how to determine the experimental parameters is greatly appreciated.

Adam_G
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  • Could you please give some more detail on your experiment? Is response variable $Y$ categorical/binary/continuous? Same question for A,B,C,D,E. How large/small effects do you need to detect? Interest in any interactions? which? What kind of model do you want to fit? ... ? – kjetil b halvorsen Aug 08 '20 at 11:47

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