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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- October 17th 2007, 07:16 AMbeetzQuestion 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! - October 17th 2007, 07:27 AMtopsquark