In addition to Bob O'Hara's suggestion, here is another citation you can
give the reviewer/editor, as to why retrospective power analyses are a
waste of time.
Hoenig, J. M. and D. M. Heisey (2001). "The abuse of power: the
pervasive fallacy of power calculations for data analysis." American
Statistician 55(1): 19 - 24.
Last year the ESA updated its author guidelines for reporting
statistics, and removed a suggestion to report power analyses that had
been inserted in the 1980s.
-Brian Inouye
Florida State University
Chair, statistical ecology section of the ESA
On 4/12/2012 6:00 AM, r-sig-ecology-requ...@r-project.org wrote:
2) A reviewer requested a power analysis of the ability to detect a
significant random effect. Any tips on how to approach that?
Report the random effect and confidence intervals. Retrospective power
analyses are pretty pointless (e.g. see
http://beheco.oxfordjournals.org/content/14/3/446.full), unless you're
planning to repeat the experiment. Bob
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