question archive Professor Ivy's students have a Mean grade of 74 and a Standard Deviation of 4

Professor Ivy's students have a Mean grade of 74 and a Standard Deviation of 4

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Professor Ivy's students have a Mean grade of 74 and a Standard Deviation of 4. If Johnny has an 80 in the class, what would be the z-score for Johnny's grade? 

Using a percentile, write a meaningful sentence from your answer above?

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