Translated Gamma Distribution

Discussion in 'SP8' started by a.virdee, Apr 7, 2016.

  1. a.virdee

    a.virdee Member

    Hi,

    I have what may be a dumb question. Is the translated Gamma Distribution in the formula tables or do we just have to know it?

    Thank you!
     
  2. Katherine Young

    Katherine Young ActEd Tutor Staff Member

    You just have to know it.
     
  3. td290

    td290 Member

    Sorry, I don't have the formula tables to hand, but depending on how you like to work, surely it's easy to derive it from the vanilla Gamma Distribution, i.e. variance and standardised skewness are going to be the same; mean will be the mean of the vanilla Gamma plus the translation parameter, etc.
     
  4. Katherine Young

    Katherine Young ActEd Tutor Staff Member

    Indeed. But the skewness isn't in the tables either. Of course, it's easy to work out the skewness from the coefficient of skewness (which is in the tables), but still it's just one more thing to worry about. In short, don't get caught out by assuming the tables give you everything on a plate.
     

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