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3. (6pts)Find the z-score for a given area or probability. (a). For a standard normal curve, find the z-score that separates the bottom 90% from

3. (6pts)Find the z-score for a given area or probability.

(a). For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.

(b). Given P(Z > a) = 0.9332. Find a.

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