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Math Help - Stuck again

  1. #1
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    Stuck again



    Im now stuck on part (iii) of this question.

    On part (i) i found:

    \overline{x}=0.5

    Var[X]=0.545

    Im pretty sure these are right, and just check me on that if you can.

    For part (ii), i just explained about there being a set time frame and a fixed average number of events per time frame, which i think is something to do with it.

    I'm now really stuck on part (iii). I've got a couple of ideas which i think would give the right idea, but im still pretty unsure.

    Any directions?
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  2. #2
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    Quote Originally Posted by nugiboy View Post


    Im now stuck on part (iii) of this question.

    On part (i) i found:

    \overline{x}=0.5

    Var[X]=0.545

    Im pretty sure these are right, and just check me on that if you can.

    For part (ii), i just explained about there being a set time frame and a fixed average number of events per time frame, which i think is something to do with it.

    I'm now really stuck on part (iii). I've got a couple of ideas which i think would give the right idea, but im still pretty unsure.

    Any directions?
    f_n = 40 \Pr(X = n) where Pr(X = n) is calculated using the pmf for the Poisson distribution.
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