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Math Help - When using normal approximation.... (fast word answer)

  1. #1
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    When using normal approximation.... (fast word answer)

    When using normal approximation for binomial distribution (z-scores, standard deviation, mean ect...) can you ever put the mean before the other number
    so (MEAN-X)/standard deviation?????????
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    Quote Originally Posted by Arbitur
    When using normal approximation for binomial distribution (z-scores, standard deviation, mean ect...) can you ever put the mean before the other number
    so (MEAN-X)/standard deviation?????????
    Why would you want to?
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  3. #3
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    Quote Originally Posted by Arbitur
    When using normal approximation for binomial distribution (z-scores, standard deviation, mean ect...) can you ever put the mean before the other number
    so (MEAN-X)/standard deviation?????????
    This will change the sign of the z-score, so depending on the table you are
    using it will possibly allow you to look up a probability for a non-tabulated z-score, or will give the other tail probability, or ..

    But there realy is no point (as far as I can see).

    RonL
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