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PSPP-BUG: bug in pspp

From: Michael Schneider
Subject: PSPP-BUG: bug in pspp
Date: Wed, 26 Mar 2014 14:54:11 +0100

Dear Ladies and Gentlement,
there is bug in pspp.
In the t-test for independent samples, the standard error of the differences of means with equal variances is not calculated correctly.
In this case, the standard error for differences of mean values ​​is performed by independent samples with unequal variances.
Please compare the indentical analyzes of SPSS and PSPP.
Second, second, for biostatistical analysis a three digit representation of the results is desirable.
Thank You very much for Your attention.
Your sincerely,
Michael Schneider
Center for Musculosceletal Research
University of Würzburg
0049 / 931 / 803-1577

Attachment: analysis_spss.pdf
Description: Adobe PDF document

Attachment: analysis_pspp.pdf
Description: Adobe PDF document

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