SOLUTION: A teacher says that the top 10% of the class received an A on the last test. The scores were normally distributed with mean 63 and standard deviation 10. Find the minimum score req

Question 807019: A teacher says that the top 10% of the class received an A on the last test. The scores were normally distributed with mean 63 and standard deviation 10. Find the minimum score required to get an A.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A teacher says that the top 10% of the class received an A on the last test. The scores were normally distributed with mean 63 and standard deviation 10. Find the minimum score required to get an A.
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Find the z-score with a left tail of 0.9 (right tail of 0.10).
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invNorm(0.9) = 1.2816
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Find the corresponding score:
x =z*s + u
x = 1.2816*10 + 63
x = 75.816
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Cheers,
Stan H.
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