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On a recent quiz, the class mean was 72 with a standard deviation of 2.5. Calculate the z-score (to 2 decimal places) for a person

On a recent quiz, the class mean was 72 with a standard deviation of 2.5. Calculate the z-score (to 2 decimal places) for a person who received score of 69. z-score: Is this unusual?

Unusual
Not Unusual

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