Date: Thu, 22 Sep 2011 14:48:02 -0500
Reply-To: "Swank, Paul R" <Paul.R.Swank@uth.tmc.edu>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Swank, Paul R" <Paul.R.Swank@uth.tmc.edu>
Subject: Re: Selecting a Statistical Test for unmatched pre post survey
In-Reply-To: <1316718752954-4831215.post@n5.nabble.com>
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How many schools are included?
Dr. Paul R. Swank,
Children's Learning Institute
Professor, Department of Pediatrics, Medical School
Adjunct Professor, School of Public Health
University of Texas Health Science Center-Houston
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of seguchi
Sent: Thursday, September 22, 2011 2:13 PM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: Selecting a Statistical Test for unmatched pre post survey
N is the subject numbers who took the pretest/posttest. The number increased
in posttest for some reasons (could be change of school or available seating
in classroom or...). So far I was able to divide up both pretest and
posttest in grade levels. but there is no way I can find matched pairs. The
survey only had the pictures of fruits and vegetables, and students were
only have to circle the pictures that apply to them.
I have tried independent t-test, but I was not sure how accurate my analysis
was. I thought of doing dependent t-test since both dependent and
independent varibles are on interval level.
My data looks like this in excel
Grade level School Testscore Pretest/Posttest
1st PS1 20 Pre
2nd PS2 5 Post
: : : :
I am cleaning the data and putting them in SPSS and just grew concerned
about the reliability of my analysis (since I was not there to administer
those tests nor was able to instruct the evaluation team on how to
administer the tests).
However, I greatly appreciate all of you for these valuable advises.
If you have any thoughts or anything, I'd be grateful to hear them.
Thanks so much.
--
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