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4. In this class, a score of 80 had a z-score of 1.0 while a score of 84 had a z-score of 2.0. What

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4. In this class, a score of 80 had a z-score of 1.0 while a score of 84 had a z-score of 2.0. What is the mean and standard deviation for this class?

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