Timeline for How to analyze these data?
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| Sep 22, 2010 at 14:52 | comment | added | Chuangye | Whuber,but I foud "The Kruskal-Wallis test does not assume population normality nor homogeneity of variance, as does the parametric ANOVA, and only requires ordinal scaling of the dependent variable." that you can see from jstor.org/pss/1165320 or oak.ucc.nau.edu/rh232/courses/EPS525/Handouts/…. | |
| Sep 20, 2010 at 14:38 | comment | added | whuber♦ | At this point you need to consider how the data were generated and you need to more formally specify your study objectives. The Kruskal-Wallis test, as I recall, looks for a shift of location but assumes homogeneous variances, which obviously is not the case here (compare V4 to V6). The data-generation process may suggest useful analyses (e.g., these data might be rescaled counts or they could be autocorrelated or the low values might represent measurement noise only). | |
| Sep 20, 2010 at 11:29 | history | edited | Chuangye | CC BY-SA 2.5 |
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| Sep 20, 2010 at 6:19 | history | edited | Chuangye | CC BY-SA 2.5 |
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| Sep 20, 2010 at 6:14 | history | answered | Chuangye | CC BY-SA 2.5 |