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Math Help - Poison distribution

  1. #1
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    Question Poison distribution

    I'd appreciate help with the following:

    X follows a Posion distribution with an average of = 6.30 Answer to four decimal places not two percentage decimal points.

    1. P(x=3)= I got 0.0765

    2. P(x>3)= I don't know how to do it.

    Thanks.
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  2. #2
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    Quote Originally Posted by 10219929 View Post
    I'd appreciate help with the following:

    X follows a Posion distribution with an average of = 6.30 Answer to four decimal places not two percentage decimal points.

    1. P(x=3)= I got 0.0765

    2. P(x>3)= I don't know how to do it.

    Thanks.
    P(x>3) = 1 - P(x<=3) = 1 - P(x=0) - P(x=1) - P(x=2) - P(x=3).
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  3. #3
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    Quote Originally Posted by 10219929 View Post
    I'd appreciate help with the following:

    X follows a Posion distribution with an average of = 6.30 Answer to four decimal places not two percentage decimal points.

    1. P(x=3)= I got 0.0765
    looks correct to me.

    RonL
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  4. #4
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    Confirm answer

    I finally got P(X>3)= 0.8736, could you guys confirm if I did it right?

    Thanks.
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  5. #5
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    Quote Originally Posted by 10219929 View Post
    I finally got P(X>3)= 0.8736, could you guys confirm if I did it right?

    Thanks.
    It's correct.

    FYI, I used the POISSON function in a spreadsheet to get the answer.
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