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What are their letter grades using this system

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Reference no: EM132201100

A school grades with the following system based on z scores.

A = z > 2

B = z < 2 and >/= 1

If a class of 10 students take a quiz and half get a 90 and half get a 92, the mean is 91 and the standard deviation is 1.05. What are their letter grades using this system?

Reference no: EM132201100

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