82.9% of the total area is to the left of Z. What is Z? Can anyone help?
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Empirical Rule? Pr(Z < 0) = 0.50 Pr(Z < 1) = 0.84 We're in the neighborhood. Not too much more looking produces: Pr(Z < 0.829) = 0.950 <== Who-hoo!! That's an important one!
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