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Thread: t- distribution comfusion

  1. #1
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    t- distribution comfusion

    I'm asked to find the P (T < ?? ) , v= 26 , α = 0.005

    From the table , we could notice that P (T > 2.779) , v= 26 , α = 0.005 ,
    So , i think the ans should be P (T < -2.779 ) , v= 26 , α = 0.005 ,

    But the ans is P (T < 2.779) , why ?
    Is the ans wrong ? https://imgur.com/a/PuPgT
    Attached Thumbnails Attached Thumbnails t- distribution comfusion-t.jpg  
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  2. #2
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    Re: t- distribution comfusion

    You have to take into account that this table shows positive values of the T distribution. P(T<-2.779)=P(T>2.779) because the T distribution is symmetric. I hope this helps.

    t- distribution comfusion-capture.png
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