[R] help comparing two median with R

Jim Lemon jim at bitwrit.com.au
Tue Apr 17 12:36:35 CEST 2007

Pedro A Reche wrote:
> Dear R users,
> I am new to R and  I would like to ask your help with the following  
> topic. I have three sets of numeral data, 2 sets are paired and a  
> third is independent of the other two. For each of these sets I have  
> obtained their basic statistics (mean, median, stdv, range ...).    
> Now I want to compare if these sets differ. I could compare the mean  
> doing a basic T test . However, I was looking for a test to compare  
> the medians using R.   If that is possible I would love to hear the  
> specifics.

Hi Pedro,
You can use the Mann-Whitney test ("wilcox" with two samples), but you 
would have to check that the second and third moments of the variable 
distributions were the same, I think.


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