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Math Help - Discrete Variables

  1. #1
    mhakkinen68
    Guest

    Discrete Variables

    There are 2 questions dealing with discrete variables I have included as attachment which I hope someone could help shed some light on.

    For Question 1, what exactly is a discrete variable Z? All I observe is with each increment of Z, it is effectively the equivalent of integrating the exponential function of T with Z as the upper limit and (Z-1) as the lower limit. So how should I define this discrete variable Z as defined in the question?


    For Question 2, could someone show how T.exp(alpha) is an exponential random variable with parameter lamda?

    Thanks.
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