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  3. on a recent quiz the class mean was 72 with a stan

On a recent quiz the class mean was 72 with a standard deviation of 3...

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On a recent quiz the class mean was 72 with a standard deviation of 3 Calculate the z score to 2 decima places for a person who received score of 81 Z score Is this unusual Further than 2 standard deviations away from the mean Unusual

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