Which exam score is more unusual based on a z-score? A. A score of 420 on a test with a mean = 500 and standard deviation = 60B. A score of 520 on a test with mean = 600 and a standard deviation = 65

Which exam score is more unusual based on a z-sure a. a score of 420 on a test with mean - 500 and standand de ramon : 5) b. ascore of $20 on a test with mean - 600 and standard deviation ta