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4. For a population with u = 60 and o = 12. Find the z-score (AND say if it's below the mean or above the

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4. For a population with u = 60 and o = 12. Find the z-score (AND say if it's below the mean or above the mean) for each of the following X values: a. X=78 (3 pts) b. X=57 (3 pts) 5. A normal distribution has a population with u = 100 and o = 20. Find the following proportions: c. p(X > 102) (3 pts) d. p(X

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