AW: Error in computation of Mann-Whitney-U Test

[Mandy Nuszbaum]

Dear Oliver Walter,

 

I attached a shortened data file and Output (Copy in Excel including syntax). The data base is not very large but results should be the same, or? Maybe it’s my fault by doing the analysis.

 

The independent Variables are I002_01 to I002_04. The group variable is sum_HL with groups 0 and 1.

 

John Darrington mentioned, that there was an error, which was fixed (“I suspect this is bug 47041 which has been fixed about a year ago”). So, I installed PSPP new and did the analysis again (see Excel file).

 

I have installed the version: pspp-20160927-daily-32bits-setup.exe

 

Hope you can help, because my students use pspp and I like to be sure that they get correct data output. The attached data is from such a student project.

 

Thanks for your fast response.

 

Kind regards,

Mandy Nuszbaum

 

 

Von: Dr. Walter Statistics [mailto:address@hidden
Gesendet: Samstag, 4. März 2017 19:51
An: address@hidden; address@hidden
Betreff: Re: Error in computation of Mann-Whitney-U Test

 

Dear Prof. Nuszbaum,

your question would be easier to answer if you described it in more detail, e.g. by posting your outputs and / or your data sets (if the sample sizes are small, we could compare the results).

Kind regards

Oliver Walter

---
Dr. Walter Statistics
Gabelsberger Straße 27
24148 Kiel

Am 04.03.2017 um 19:20 schrieb Mandy Nuszbaum:

Dear all,

 

I computed Mann-Whitney-U using PSPP and SPSS and compared the results using different data sets. Results are completely different and led to wrong conclusions.

 

Can anyone fix the problem?

 

Kind regards,

mn

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Output PSPP_SPSS Mann-Whitney-U.XLSX
Description: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Berechnungscheck.sav
Description: application/spss-sav