<PRE><B>Question 909689</B>
Scores on a common final exam are normally distributed with a mean of 66 and a standard deviation of 11. Approximately the top 10% of the students will receive an A. Approximately, what is the minimum exam score to award an A?
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Find the z-value with a left tail of 0.90
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invNorm(0.90) = 1.2816
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Find the corresponding score::
x = z*s + u
x = 1.2816*11+66 = 80 when rounded down
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Cheers,
Stan H.
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