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I am doing a research in 12 participants where I perform two different techniques three times each, at different moments. I would like to calculate the combined CV (Mean CV1 + CV2 + CV3), but I don't know if this is statistically possible, and the best way to do it.

Marco Pinto
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    The usual method is to square the SDs to get variances, average the variances, take the sqrt of the avg of variances. For SDs 1, 3, 5 it's the difference between 3 and 3.4.// Variances of indep RVs are additive. SDs are not. – BruceET May 24 '20 at 09:59
  • Sorry. I didn't explain myself. I would like to calculate the combined coefficient of variation. – Marco Pinto May 24 '20 at 16:34
  • Don't you need to find the SD in order to get the CV? – BruceET May 24 '20 at 18:30
  • Yes I do. Can you please clarify your method? – Marco Pinto May 25 '20 at 09:33

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