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Standardized exam's scores are normally distributed. In a recent year, the mean test score was 21.2 and the standard deviation was 5.7 The test scores of four students selected at random are 15,23,7 and 35 . Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 15 is
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Standardized exam's scores are normally distributed. In a recent year, the mean test score was 21....
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