SPSS 18 Nonparametric tests

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SPSS 18 Nonparametric tests

Thew, Barbara-2

Can you help please?

 

A colleague of mine is trying to conduct a non-parametric test on 2 groups.  However, the facility to define your groups no longer seems to be available in SPSS 18 – has this been moved and if so, where to?

 

Thanks for your help

 

Barbara

 

Barbara Thew

Customer Support Services

Computing Services

University of Liverpool

Telephone: 0151 794 4432

Email: b.n.thew@...

 

 

 

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Re: SPSS 18 Nonparametric tests

zstatman
This looks to be an independence tests, if so then Nonparametric>Independent
is where to go

WMB
Statistical Services

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On 6/8/2010 6:37:20 AM, Thew, Barbara ([hidden email]) wrote:
> Can you help please?
>
> A colleague of mine is trying to conduct a non-parametric test on 2
groups.

> However, the facility to define your groups no longer seems to be
> available in SPSS 18 - has this been moved and if so, where to?
>
> Thanks for your help
>
> Barbara
>
> Barbara Thew
> Customer Support Services
> Computing Services
> University of Liverpool
> Telephone: 0151 794 4432
> Email: [hidden email]

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Will
Statistical Services
 
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Re: SPSS 18 Nonparametric tests

SPSS Support-2
In reply to this post by Thew, Barbara-2


Hello Barbara,
 In the Nonparametric Tests-> Legacy Dialogs (NPAR TESTS command) in Statistics 18, you can run a 2-sample test like Mann-Whitney with a group variable with 3 or more groups because there is a Define  Groups dialog to choose the 2 groups of interest. This dialog is not available in the Fields tab of the
Nonparametric Tests->Independent Samples dialog (NPTESTS command). The option to name specific groups is also not available in NPTESTS syntax. However, you can request pairwise comparisons as  part of the output for the Kruskal-Wallis,  Jonckheere-Terpstra, and Median tests. The pairwise comparisons are only performed if the overall test is significant at the level specifed in the Test Options dialog of the Settings tab.
 Suppose that your 2-sample test was a planned comparison. To perform a 2-sample test with NPTESTS on 2 groups from a variable with 3 or more levels, you need to use a filter to select cases from the 2 groups before you run the NPTESTS procedure. You can select the cases from the menu item
 Data->Select Cases->If case satisfies condition. If you wanted cases in groups 1 and 3 on the variable JOBCAT, then the function ANY(jobcat,1,3) would select cases that met that criterion.  An example of a quick syntax combination is:

temporary.
select if ANY(jobcat,1,3).
NPTESTS
  /INDEPENDENT TEST (work) GROUP (jobcat) MANN_WHITNEY
  /MISSING SCOPE=ANALYSIS USERMISSING=EXCLUDE
  /CRITERIA ALPHA=0.05  CILEVEL=95.

The Temporary command undoes the following selection once the NPTESTS command has run.
 
David Matheson
Statistical Support
SPSS, an IBM company


----------
From: "Thew, Barbara" <[hidden email]>
To: [hidden email]
Date: 06/08/2010 05:39 AM
Subject: SPSS 18 Nonparametric tests
Sent by: "SPSSX(r) Discussion" <[hidden email]>





Can you help please?
 
A colleague of mine is trying to conduct a non-parametric test on 2 groups.  However, the facility to define your groups no longer seems to be available in SPSS 18 – has this been moved and if so, where to?
 
Thanks for your help
 
Barbara
 
Barbara Thew
Customer Support Services
Computing Services
University of Liverpool
Telephone: 0151 794 4432
Email: b.n.thew@...