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Grading on the Curve: A final exam for a large class of students is constructed so...

Grading on the Curve: A final exam for a large class of students is constructed so that final exam grades follow a normal distribution with mean µ and standard deviation σ. The class is graded on the curve, which means that a final exam score of x translates into a final exam letter grade according to the following table:

Grade Range

A µ + σ < x

B µ < x < µ + σ

C µ − σ < x < µ

D µ − 2σ < x < µ

What percentage of the class will receive an A?

What percentage of the class will receive a D?

Math   Statistics-And-Probability   
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TOPIC:Normal distribution and probabilities.

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