SOLUTION: My Stat 154 class, let mean score is 78 and standard deviation is 7. I would like to award A to top 10% students. Find the minimum score student should get in order to get A in m

Question 591290: My Stat 154 class, let mean score is 78 and standard deviation is 7. I would like to award A to top 10% students. Find the minimum score student should get in order to get A in my class
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
My Stat 154 class, let mean score is 78 and standard deviation is 7. I would like to award A to top 10% students. Find the minimum score student should get in order to get A in my class
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Find the z-value with a left tail of 90%.
z = 1.2816
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Find the corresponding score:
x = zs+u
x = 1.2816*7 + 78 = 86.97
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Cheers,
Stan H.
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