Discussion:
Please, a question on how to use PSPP
(too old to reply)
Paloma Rohlfs Dominguez
2018-06-15 11:07:41 UTC
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Good morning,

I need to apply the non-parametric test U Mann-Whitney by means of the PSPP, but I do not find this test on PSPP. Please, what can I do?

Thank you very much in advance,
best regards,

P.R.D.
--
Dra. Paloma Rohlfs Domínguez
Universidad de Extremadura
Dpto. de Psicología y Antropología
Avda. de la Universidad s/n
10003 Cáceres
e-mail: ***@unex.es
Tlf. 927257000/Ext. 51241
Alan Mead
2018-06-15 17:11:28 UTC
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You can perform this test using syntax in PSPP.

Open a new syntax window, type the syntax (see below), and run it.

The syntax is explained here:
https://www.gnu.org/software/pspp/manual/html_node/MANN_002dWHITNEY.html,
here:
https://www.gnu.org/software/pspp/manual/html_node/NPAR-TESTS.html#NPAR-TESTS
and here:
https://lists.gnu.org/archive/html/pspp-users/2012-05/msg00043.html

For example, if you have groups defined by values 1 and 2 in a variable
called GROUP and you want to analyze variable SCORE, then you type:

NPAR TESTS
/MANN-WHITNEY = SCORE BY GROUP (1,2).

If this isn't clear, please post more information about your problem or
concern (or error message).

-Alan
Post by Paloma Rohlfs Dominguez
Good morning,
I need to apply the non-parametric test U Mann-Whitney by means of the PSPP, but I do not find this test on PSPP. Please, what can I do?
Thank you very much in advance,
best regards,
P.R.D.
--
Alan D. Mead, Ph.D.
President, Talent Algorithms Inc.

science + technology = better workers

http://www.alanmead.org

I've... seen things you people wouldn't believe...
functions on fire in a copy of Orion.
I watched C-Sharp glitter in the dark near a programmable gate.
All those moments will be lost in time, like Ruby... on... Rails... Time for Pi.

--"The Register" user Alister, applying the famous
"Blade Runner" speech to software development
Dr. Oliver Walter
2018-06-15 17:13:36 UTC
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Dear Ms Rohlfs Dominguez,

you are right that the Mann-Whitney U test and other nonparametric tests
for two independent samples are still not implemented in the GUI of PSPP
although you, me and others have been asking for it for several years.
But fortunately, the U test can be computed if you write the syntax

NPAR TESTS
/STATISTICS=DESCRIPTIVES
/MISSING=LISTWISE
/MANN-WHITNEY = x  BY y (1 2)

in a syntax window / file of PSPP.

x stands for your dependent variable.

y stands for your independent, grouping variable.

1, 2 stand for the codes of the two groups.

You have to replace x, y, 1 and 2 appropriately when you work with your
data set.

Kind regards,

Dr. Oliver Walter
Post by Paloma Rohlfs Dominguez
Good morning,
I need to apply the non-parametric test U Mann-Whitney by means of the PSPP, but I do not find this test on PSPP. Please, what can I do?
Thank you very much in advance,
best regards,
P.R.D.
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