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Thread: Relation between n, p, q, and sigma

  1. #1

    Relation between n, p, q, and sigma

    I know the value of n and p. I am looking for the standard deviation and mean based on those values. I gather that the forumla for sigma, the standard deviation, is:

    sigma = square root of n*p*q

    I do not know the value of q.

    How can I find sigma? Do I need to find q first? If so, how do I find q if I only know n and p?

    Thanks.

  2. #2
    Elite Member
    Join Date
    Sep 2005
    Posts
    7,294

    Re: Relation between n, p, q, and sigma

    q is just 1-p

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