PSPP-BUG: [bug #51373] Problems with REGRESSION (Incorrect standard error?)

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?51373>

                 Summary: Problems with REGRESSION (Incorrect standard error?)
                 Project: PSPP
            Submitted by: None
            Submitted on: Mon 03 Jul 2017 05:33:12 PM UTC
                Category: Numerical Errors
                Severity: 5 - Average
                  Status: None
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: None
                  Effort: 0.00

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Details:

I've searched through the list of bugs briefly, but didn't see anything
listed...

I've been working with PSPP as an alternative for SPSS in my undergrad stats
class. I noticed some irregularities with the linear regression module. 

It appears that PSPP will produce different standard errors for the constant
depending on the order in which the variables are entered into the model. This
in turn produces different t-values and significance levels. 

I've attached an output files using the 2014 GSS survey showing how different
coefficient are produced depending on the order in which they are entered.
I've also attached output from SPSS that can be used as a comparison.



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File Attachments:


-------------------------------------------------------
Date: Mon 03 Jul 2017 05:33:12 PM UTC  Name: SPSS Regression Output.pdf  Size:
18kB   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=41109>
-------------------------------------------------------
Date: Mon 03 Jul 2017 05:33:12 PM UTC  Name: PSPP Regression Output.pdf  Size:
38kB   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=41110>

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