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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