[R] Comparing two groups

Andrej andrej.g.miller at web.de
Tue Oct 15 14:01:28 CEST 2013

>So why not start with some statistical textbook? There are plenty of them
available in CRAN. 

I wasn't implying, that I haven't read any textbook, or didn't do any
research. I read some textbooks/Papers/etc. during the research about what
to do and came across the wilcox test. I meant to imply that I could have
problems understanding some of the answers, and that maybe additional
explaining would be necessary.

My doubts stem from the fact, that the wilcox test is a - as far as I know -
ranking test, that states if two groups are different. My assumption is, due
to the fact that the second group has a much higher sample size, it is clear
that it differs from the first group. I performed a t-test (just to see; I
am aware that I am not allowed to perform it, because my samples aren't
normally distributed) and it gave me a p-value of 0.3.
Actually I am not even entirely sure, if wilcox is the right test. I just
want to know if the means of the two groups are significantly different.

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