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Only the Upper 30% of a Normally Distributed Class Passed

Question 42

Multiple Choice

Only the upper 30% of a normally distributed class passed a quiz for which the mean was 70 and the standard deviation was 10.In this class,76.7 and 78.4 are the boundary limits for students who scored between what percentiles?


A) 75th and 80th
B) 80th and 85th
C) 77th and 80th
D) 67th and 80th

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