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    help with comparing paired values




    Hi

    I have a question regarding comparing data. I have data in spss as presented here:...the list goes on for a thousand entries (ie...A, B, C, D, E, ....etc to the thousandth line)

    a1 a2 b1 b2 c1 c2
    A 0.783 0.233 0.204 0.293 0.152 0.269
    B 0.94 0.62 0.272 0.073 0.076 0.179
    C 5.246 5.662 3.269 3.373 3.795 2.329
    D 0.235 0.155 0.341 0.147 0.531 0.179
    .
    .
    .


    This was multiple tests (each row, capital letter A, B, etc) I ran on specimens a1, a2, b1, b2, c1, c2.
    a1 and a2 are one specimen...pre treatment and post treatment
    similar for b1 and b2, and c1 and c2


    I want to see if there is a difference between pre and post for each test.

    Currently, I can think of doing a paired t test so that it will look like this:

    Test A
    --------
    1 2
    a 0.783 0.233
    b 0.204 0.293
    c 0.152 0.269

    And run a paired t test on this.

    Then do it for Test B, then Test C, etc.

    However, I do not know how to do this in SPSS without manually creating a thousand secondary charts to run the paired t test.

    Does anyone know a way to do this in an (semi-)automated fashion?

    Thank you

  2. #2
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    Re: help with comparing paired values

    Not an SPSS User, but can you rename group_1,..., group_1000. Then use a by statement (group_1-group_1000)?
    Stop cowardice, ban guns!

  3. #3
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    Re: help with comparing paired values


    thanks. How is this done in SPSS? I can't seem to find a function like it.

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