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difference of means and n

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  • #46878

    Darcy
    Participant

    Hello,
    I want to make some statements about difference of means tests. For example, there was a significant difference for mean weight diameter of soil for pasture land versus cultivated land (p = 0.05, n = 33). If my pasture n=11 and cultivated land n=22, are they commonly reported separately or is it typical to clump them together.
    Thank you,
    Darcy

    0
    #155624

    clb1
    Participant

      When reporting statistics concerning differences in means you usually want to report those details that will help the reader understand what it was you did.  If I were writing your report I’d have a table that looked something like this:
    Mean 1  N1 Std1   Mean2  N2  Std2  t-value p-value
       X1      11    S1      X2      22   S2     a.bc        <.043
    If there were no significant differences in the standard deviations and the test was using pooled variance, I’d drop the Std1 and Std2 and just have a single column for the pooled standard deviation.
    Mean 1  N1 Mean2  N2  Pooled Std.  t-value p-value
       X1      11    X2      22      Sp              a.bc     <.043

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    #155625

    Darcy
    Participant

    Thank you!

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