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Math Help - T-scores!

  1. #1
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    T-scores!

    Eek, so I'm not sure if this is the right forum, but it is technically statistics
    Psychology student trying to work out a t-score, but I'm not really good at math, so I'm really struggling with this equation!
    please help!!

    T = (5.65-511)√(29+77-2)22x77
    over
    √(29x16.5 + 77x18.57)(29=77)

    I think that's typed out right ):
    If someone could help me, I would very grateful!!!!
    Last edited by mr fantastic; December 13th 2011 at 01:28 AM. Reason: Title.
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  2. #2
    MHF Contributor matheagle's Avatar
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    Re: Help please on T-scores!! URGENT!!

    looks like a two sample t statistic
    where your n's are off
    you need to pool correctly and thats looks like a 29+77-2 below
    and 29 should be a 28 and 77 a 76 in the pooled sample variance
    BUT do explain where this is coming from
    that would make my job easier
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  3. #3
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    Re: Help please on T-scores!! URGENT!!

    It was basically a re-creation of Brugger et al's sheep/goat effect
    people were asked to iagine a dice rolled 66 times and to read out the numbers they imagined, then were asked to rate their belief in ESP on a scale of 1-6
    1-2 are the 'sheep' 5-6 are the 'goats'
    We then took the amount of time the participents said a number twice in a row
    e.g 6, 2, 3,[COLOR=rgb(0, 0, 0)] 4, 4[/COLOR], 1

    number of participants in group 1 = 29
    number of participants in group 2 = 77
    group 1 mean = 5.65
    group 2 mean = 5.11
    group 1 SD = 4.23
    group 2 SD = 4.3
    group 1 varience = 17.94
    group 2 varience = 18.57

    Thank-you for replying by the way, I've been at this for over 6 hours now ):
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  4. #4
    MHF Contributor matheagle's Avatar
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    Re: Help please on T-scores!! URGENT!!

    It's the same as the other post I replied to tonight
    It's a s-pooled t situation
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