RE: Pspp-users and 2 problems with the Windows version

Hi Robin here again,

I've been working through sections 5.2.3 and 5.2.4 on pages 19 and 20 of the manual with the hotel.sav sample file.

I've repeated the steps about computing v3 to be 6 - the old v3 and v5 to be 6 - the old v5

and then testing the reliability of variables v1, v3 and v5 but Cronbach's Alpha comes out at -0.15, not as 0.86 as it says in the manual.

The steps below are from the Output file of what I did:

GET

GET FILE="F:\hotel.sav".

COMPUTE

COMPUTE v3 = 6-v3.

EXECUTE

EXECUTE.

COMPUTE

COMPUTE v5 = 6-v5.

EXECUTE

EXECUTE.

RELIABILITY

RELIABILITY /VARIABLES= v1 v3 v5 /MODEL=ALPHA /SUMMARY = TOTAL.

Scale: ANY

Case Processing Summary

		N	%
Cases	Valid	17	100.00
	Excluded	0	.00
	Total	17	100.00

Reliability Statistics

Cronbach's Alpha	N of Items
-.15	3

Item-Total Statistics

	Scale Mean if Item Deleted	Scale Variance if Item Deleted	Corrected Item-Total Correlation	Cronbach's Alpha if Item Deleted
I am satisfied with the level of service	6.59	1.51	.36	-2.32
The staff were slow in responding	6.59	1.38	.47	-2.89
There was too much noise in the rooms	5.18	7.15	-.60	.91

I wonder why?

My second problem is that I have been trying to do some regression analysis with a data file h23adapted.sav (attached) which I got from the following web page:

http://www.psychstat.missouristate.edu/multibook/mlt08m.html

On that web page the author explains how to make dummy variables 'familys' and 'biology' from the three level categorical data in the 'dept' variable.

I've been trying to do it in PSPP using "Transform" then the "Recode in Different Variable" option. I can get Dept to be the Old variable but I can't get PSPP to take anything in the Output Variable Name or Label. I can get to the Old and New Values window and recode all the old values to new values but I can't tell PSPP the name of the output variable even though I have created my two dummy variables familys and biology (Screenshot attached).

Please could you tell me if I am not doing the right thing or are both my problems (Cronbach's Aplha value and the problem recoding into different variables) to do with the Windows version of PSPP which are fine on non-Windows platforms?

Thanks,

Robin

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> Subject: Pspp-users Digest, Vol 104, Issue 1
> To: address@hidden
> Date: Fri, 2 Jan 2015 12:00:12 -0500
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> Today's Topics:
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> 1. Re: Re: Windows PSPPIRE/PSPP is pretty wonky (Harry Thijssen)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 1 Jan 2015 20:43:38 +0100
> From: Harry Thijssen <address@hidden>
> To: "address@hidden" <address@hidden>
> Subject: Re: Re: Windows PSPPIRE/PSPP is pretty wonky
> Message-ID:
> <address@hidden>
> Content-Type: text/plain; charset="iso-8859-1"
>
> >
> > On Tue, Dec 30, 2014 at 04:58:48PM -0600, Alan Mead wrote:
> > John and Harry,
> >
> > PSPPIRE.exe 0.8.4-g5ce6b1 (and the associated PSPP) is pretty wonky.
> > Paste doesn't work correctly (I believe that's a know issue?). To
> > paste
> > syntax into the syntax window, I had to right-click and choose paste;
> > neither Control-v or Edit > Paste would paste the text.
> >
>
> I could reproduce this and it is indeed realy strange. It is not limited to
> the syntax window, but the same happens in the dataview. If you copy some
> data from outside PSPPIRE (for example from notepad to psppire) you can
> only paste it in PSPPIRE when you right-click. Data copied from inside
> PSPPIRE (for instance from dataview to syntax editor) can be copied pasted
> the usual way!
> A reason for this.......I have no idea...
>
>
> > And Run > Current line wasn't working (but now I cannot replicate it,
> > I'm guessing it has to do with where the cursor was rather than which
> > line of the syntax window was "shaded"). What was most annoying is
> > that
> > by "not working" I mean that the output window would flash but there
> > was
> > no additional output in the window and no warning or error.
> >
>
> I could only reproduce this if the current line is part of a command on
> several lines.
>
> I don't know why this should be. Perhaps Harry can shed some light on it.
> >
> > And then look at the boxplot I got when I ran Robin's syntax on the
> > physio data (attached "boxplot.png")... I don't use examine and I
> > don't
> > know what " /STATISTICS = EXTREME (3)" is meant to do, but I know
> > what a
> > boxplot is and there shouldn't be values like 9999999 between 1200 and
> > 200 on the y-axis.
> >
> > [ EXTREME (3) reporst the largest and smallest three values of the
> > variable ]
> >
> > Regarding the 99999 issue, I certainly don't get that on GNU/Linux - my
> > guess is that
> > Windows has rounding issues and is miscalculating 300 as
> > 299.99999999999999 (the left
> > hand side is off the page).
> >
>
> Maybe it is possible to round it when used on the axis.
>
> Happy new year to everybody and
> Have fun
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From:	Robin Reeves
Subject:	RE: Pspp-users and 2 problems with the Windows version
Date:	Fri, 2 Jan 2015 22:24:58 +0000