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Math Help - Poisson distribution

  1. #1
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    Poisson distribution

    LEt X have a Poisson distribution with mean = 4. Show that

    P(u -2sigma < X < u +2sigma) = .931

    anyone know how i should go about starting this problem? stumped.
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  2. #2
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    What is the CDF and standard deviation of the Poisson distribution?
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  3. #3
    MHF Contributor matheagle's Avatar
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    moo, I mean \mu=\sigma=4

    So calculate P(4-8<X<4+8) for a Poisson with moo=4.

    which is F(11) btw.
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