X4 Assignment Q10 part 2

Discussion in 'CS2' started by ldr, Jan 18, 2020.

  1. ldr

    ldr Member

    In part 2 of the question

    the mean residual life is given as 1 for the Exp(1) dist

    and for Ga(2,1) it is 1 + 1/(x+1)

    I understand that the exp dist is constant for the mean residual life

    And for gamma it is a decreasing function of x

    however I don’t understand why in this particular instance the solution says that the Ga distribution has a lighter tail than the exp dist

    the mean residual life will decrease asymptotically towards 1 so it’s always above the mean residual life for Exp(1) dist

    surely this mean that the Ga distribution has a heavier tail??
     
  2. Julie Lewis

    Julie Lewis ActEd Tutor Staff Member

    You are absolutely right. Thanks very much for raising this. We'll add it to the CS2 corrections document.
     

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