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Math Help - t - test

  1. #1
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    t - test

    ive calculated T=5.4

    and the t(11,0.05)=2.2010

    does this mean we accept or reject the null because T is greater than t?

    *EDIT: I have found that the null will be rejected for this example.*

    In another example, I have found a negative T value (T=-4.3, t(13,0.05) = 2.1604) for a two tailed test, am I correct in thinking that this should just be treated as a positive value and therefore the null hypothesis is again rejected?
    Last edited by keelejody; May 2nd 2011 at 05:06 AM.
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  2. #2
    Senior Member Sambit's Avatar
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    Quote Originally Posted by keelejody View Post

    In another example, I have found a negative T value (T=-4.3, t(13,0.05) = 2.1604) for a two tailed test, am I correct in thinking that this should just be treated as a positive value and therefore the null hypothesis is again rejected?
    If your level of significance (that is , alpha) is 0.05, then for a two-tailed test, you need to calculate t(13,0.025). You have calculated the correct thing but mistakenly wrote it as "t(13,0.05)".

    Here |T| > t(13,.025). So you reject the null hypothesis.
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