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Re: st: friedman test
From
Anders Alexandersson <[email protected]>
To
[email protected]
Subject
Re: st: friedman test
Date
Tue, 29 Nov 2011 11:34:45 -0500
I agree with Nick. Also, the UCLA webpage
http://www.ats.ucla.edu/stat/mult_pkg/whatstat/choosestat.html
has links to comparable SPSS and Stata (and SAS) code. See -findit
skilmack- if you want the Friedman test when data are missing.
Anders Alexandersson
[email protected]
On Tue, Nov 29, 2011 at 11:16 AM, Nick Cox <[email protected]> wrote:
> This presumably refers to Richard Goldstein's -friedman- (SJ 5-1),
> which is user-written,
>
> The help for -friedman- explains
>
> " -friedman- expects the raters to be the variables. This is because -egen,
> rank()- ranks observations, not variables. This expectation differs from
> that in some other software."
>
> I suspect that you are not comparing like with like.
>
> Nick
>
> On Tue, Nov 29, 2011 at 3:51 PM, Daniela Ferrante (Lab. Statistica)
> <[email protected]> wrote:
>>
>> I have a question about friedman test. I tried to perform the friedman test
>> with Stata, R software and SPSS but I get quite different p values with an
>> equal p value with R and SPSS but different from Stata results. I am wondering
>> why I get quite different results.
>> I attach the data:
>>
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 4,47
>> 0,005 0,005 12,56
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,1 0,2 1,46
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>> 0,005 0,005 0,005
>>
>> Using this data I obtain p=0,69 using Stata software but p=0,06 using R and
>> SPSS software
>>
>
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>
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