[R] how to do the test for a significant difference across group mean vectors

[Uwe Ligges]

wu sz wrote:
> Hello there,
> 
> how to do the test for a significant difference between two groups
> mean vectors or across several group means vectors?


This is not an R question.

You cannot test on mean differences without assumptions re. the 
variance. Please read a basic textbook on statistics.

Uwe Ligges



> Thank you,
> Shengzhe
> 
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