On May 12, 9:11 pm, djh <halitsk...@att.net> wrote: > I realized I have never provided you with means and SD's for > "u" (dicodon representation level) for control and study groups > for all six folds, so am providing below. (If you want same for > "e" (energetic level), please let me know.) These numbers may be > useful to you in deciding whether the current experimental design > samples the data correctly when it takes study group data with u > between 1.01 and 4.00 and control group data between 1.00 and 1.36.
u -> x1, e -> x2 ? I know you said it somewhere, but I can't find it.
Study SD 1.26 1.74 2.29 2.30 1.93 2.01 Control SD 0.13 0.18 0.18 0.19 0.17 0.16 ratio 9.69 9.67 12.72 12.11 11.35 12.56
Even if the true regressions were the same in both groups, 'u' would look more useful as a predictor (and, if the sample sizes were equal, would be "more signficiant") in the Study group than in the Control group because its SD is higher. A fair comparison would require the SDs to be (close to) the same in both groups.