bugPSPP - Bugs: bug #55465, Please add Duncan's Multiple Range...

 
 

bug #55465: Please add Duncan's Multiple Range Test (MRT)

Submitted by:  Mihai Dobrescu <msdobrescu>
Submitted on:  Sun 13 Jan 2019 06:11:40 PM UTC  
 
Category:  Other Severity:  1 - Wishlist
Status:  None Assigned to:  None
Open/Closed:  Open Release:  None
Effort:  0.00

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( Jump to the original submission)

Wed 16 Jan 2019 05:55:13 AM UTC, comment #15: 

I think it's enough info.

PSPP and PSPPIRE are the same project.  Not every procedure in PSPP is available through the GUI yet.

Ben Pfaff <blp>
Project Administrator
Wed 16 Jan 2019 05:41:53 AM UTC, comment #14: 

Hi, is enough info?

I have a question, is PSPPIRE the same as this project?
I see that the GUI does not have a button for post hoc tests, even though there are some implemented already.
I'd need that too.

Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 08:05:50 PM UTC, comment #13: 

test.sav added.

(file #45960)

Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 07:55:01 PM UTC, comment #12: 

Seems that is the right data, see check.png.


Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 07:41:20 PM UTC, comment #11: 

I think, from the screenshots, test.ods contains the data to produce the outcome in test.png. It is compiled by me from all the images, but I need to check with some tool.

Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 07:12:34 PM UTC, comment #10: 

I have added more screenshots, there is an independent samples t-test data re-organized later for DMRT, but I can't be sure if they are actually the data providing the final result of DMRT in the first screenshot.

Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 07:02:39 PM UTC, comment #9: 

I think the mathematics for this are included in SPSS Statistical Algorithms, so I'm not worried about that part.

Ben Pfaff <blp>
Project Administrator
Sun 13 Jan 2019 07:00:54 PM UTC, comment #8: 

Indeed.

I think it should be like this:

ONEWAY /VARIABLES=VAR009 BY VAR010 /STATISTICS=DESCRIPTIVES HOMOGENEITY /POSTHOC=DUNCAN.

I don't know the theory and where to look for it. As it is biology, they seem to learn when to use a tool, rather than providing the mathematics behind. If I can get the original data, I will provide it, but it is unlikely, at least now.

Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 06:52:03 PM UTC, comment #7: 

That is too bad.  Probably, whoever develops this feature can find an example online.

Ben Pfaff <blp>
Project Administrator
Sun 13 Jan 2019 06:50:45 PM UTC, comment #6: 

I understand as I am a software developer myself, with a bachelor in mathematics too, but I did not have much statistics (definitely  not this one) at the time in my courses at the time.

The problem here is this is a lab problem that must be done with different data than the sample in the screenshot and the teacher refuses to provide the original data. What can I say? This makes things difficult to me too.

Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 06:45:56 PM UTC, comment #5: 

The goal of having both data and output is so that, when the feature gets implemented, the developer can use the output sample as a test case.  So, it would probably not help much to have similar data, because it would probably produce different output.

Ben Pfaff <blp>
Project Administrator
Sun 13 Jan 2019 06:43:44 PM UTC, comment #4: 

Unfortunately, I don't have the exact data, this was provided as a screenshot to me too.
I can provide some similar data, having the same structure. Does it help?

Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 06:39:51 PM UTC, comment #3: 

Thanks, that is helpful.  Are you able to also provide the data and the syntax or instructions that produced that output?

Ben Pfaff <blp>
Project Administrator
Sun 13 Jan 2019 06:37:33 PM UTC, comment #2: 

Thanks for the fast reply.

I am a totally newbie in statistics. I try to help a biology student through its labs. They use SPSS, so I guess they need the post hoc functionality at One Way ANOVA.
I am not sure of what you mean by "multiple procedures that could support".
The output in SPSS looks like test.png attached.


Mihai Dobrescu <msdobrescu>
Sun 13 Jan 2019 06:20:39 PM UTC, comment #1: 

Thanks for the request.

I see that there are multiple procedures that could support this test.  Which one is most important to you?

These requests are easier and thus more likely to be implemented if you can provide or point to an example online that includes both the input data and the expected results.

Thanks!

Ben Pfaff <blp>
Project Administrator
Sun 13 Jan 2019 06:11:40 PM UTC, original submission:  

Hello,

Please implement Duncan's Multiple Range Test (MRT).

Thank you.

Mihai Dobrescu <msdobrescu>

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:
   
   
Comment:
   

Attached Files
file #45960:  test.sav added by msdobrescu (2KiB - application/x-spss-sav)
file #45959:  check.png added by msdobrescu (365KiB - image/png)
file #45958:  t-test_data.png added by msdobrescu (51KiB - image/png)
file #45957:  test.ods added by msdobrescu (12KiB - application/vnd.oasis.opendocument.spreadsheet)
file #45955:  test_vars.png added by msdobrescu (46KiB - image/png)
file #45953:  test.png added by msdobrescu (58KiB - image/png)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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    Follow 8 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-03-02 jmd Severity5 - Average => 1 - Wishlist
    2019-01-13 msdobrescu Attached File- => Added test.sav, #45960
    2019-01-13 msdobrescu Attached File- => Added check.png, #45959
    2019-01-13 msdobrescu Attached File- => Added t-test_data.png, #45958
    2019-01-13 msdobrescu Attached File- => Added test.ods, #45957
    2019-01-13 msdobrescu Attached File- => Added test_data_partial.png, #45954
        Attached File- => Added test_vars.png, #45955
    2019-01-13 msdobrescu Attached File- => Added test.png, #45953

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