Stats t-value interpretation

Posted on 2006-03-27
Last Modified: 2007-12-19
Hi, I am having trouble interpreting the t-values of my stats test

I have two groups

group 1 - Large companies
group 2 - small companies

for eg. when I run my t-test using SPSS it generates:
t-value = -2.5
sig = 0.03

the significance I have no problem with but the t-value I do

since the t-value is negative can I say that the t-value favours group 2

or do I say the negative value the t-value favours group 1
Question by:foobarr
    LVL 84

    Accepted Solution

    It  depends whether larger or smaller means of whatever you were measuring are considered more favourable to the group
    and whether you took mean of group 1 - mean of group 2 or mean of group 2 - mean of group 1
    LVL 7

    Author Comment

    sorry I dont quite get what you are saying...

    the way I set it up was that i studied large vs small companies

    so my group 1 was means of large companies
    my group 2 was means of small companies
    LVL 84

    Expert Comment

    were the values that you were taking the means of things that companies would want to maximize, or things that companies would like to minimize?
    did you compute your t-value by subtracting the large company means from the small company means, or by subtracting the small company means from the large company means?

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