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    if the question is what is the probability mass function of Z, how do i present the answer?
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    (Original post by asdfyolo)
    if the question is what is the probability mass function of Z, how do i present the answer?


    Something like that - for the range of values list the formulae for calculating the probability and the range for which each is used.
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    (Original post by SeanFM)


    Something like that - for the range of values list the formulae for calculating the probability and the range for which each is used.
    thanks. so if Z is rolling a fair dice do i put 1/6 if z=1
    1/6 if z=2
    1/6 if z=3

    or do i put 1/6 if x in {1,2,3,4,5,6}
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    (Original post by asdfyolo)
    thanks. so if Z is rolling a fair dice do i put 1/6 if z=1
    1/6 if z=2
    1/6 if z=3

    or do i put 1/6 if x in {1,2,3,4,5,6}
    Second option is more neat.
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    (Original post by asdfyolo)
    thanks. so if Z is rolling a fair dice do i put 1/6 if z=1
    1/6 if z=2
    1/6 if z=3

    or do i put 1/6 if x in {1,2,3,4,5,6}
    You could also do:

    \displaystyle p(x) = \begin{cases}\frac{1}{6} & \text{ if } x \in \left\{1, 2, 3, 4, 5, 6\right\} \\ 0 & \text{ otherwise }\end{cases}

    Thanks to ghostwalker and poorform for the correction!
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    (Original post by Zacken)
    You could also do:

    \displaystyle p(x) = \begin{cases}\frac{1}{6} & \text{ if } 1 \leq x \leq 6 \\ 0 & \text{ otherwise }\end{cases}
    p(1.5) = \frac{1}{6}

    [/pedant]
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    \displaystyle p(x) = \begin{cases}\frac{1}{6} & \text{ if } x \in \{1,2,3,4,5,6\} \\ 0 & \text{ otherwise }\end{cases}

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    (Original post by ghostwalker)
    p(1.5) = \frac{1}{6}

    [/pedant]
    (Original post by poorform)
    \displaystyle p(x) = \begin{cases}\frac{1}{6} & \text{ if } x \in \{1,2,3,4,5,6\} \\ 0 & \text{ otherwise }\end{cases}

    :facepalm: I'm an idiot.
 
 
 
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