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Math Help - Question to clarify my understanding; regards to z-scores.

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    Question to clarify my understanding; regards to z-scores.

    why is it ok for a z-score to be -2 when all probabilities lie on the interval [0,1]?


    i'm reviewing for a test, and not exactly sure.
    thanks!
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    Quote Originally Posted by beetz View Post
    why is it ok for a z-score to be -2 when all probabilities lie on the interval [0,1]?


    i'm reviewing for a test, and not exactly sure.
    thanks!
    Because the probability is a function of z, and has a (effective) domain of ( -\infty, \infty) for a normal distribution. The probability lies in the range [0, 1], not z.

    -Dan
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