[R] Bootstrapping confidence intervals

2009-10-21 Thread Charlotta Rylander
an already poor distribution ( that do not fulfill the model assumptions for linear models) to achieve a confidence interval that "validates" the use of these linear models? I would really appriciate a simple explanation about this! Many thanks, Charlotta Rylander [[alte

[R] Bootstrap or Wilcoxons' test?

2009-02-13 Thread Charlotta Rylander
Hi! I'm comparing the differences in contaminant concentration between 2 different groups of people ( N=36, N=37). When using a simple linear regression model I found no differences between groups, but when evaluating the diagnostic plots of the residuals I found my independent variable to have