SOLUTION: The ACT exam math section scores are normally distributed with mean 18 and standard deviation 6. A particular engineering college will only accept high school seniors with ACT mat

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Question 568237: The ACT exam math section scores are normally distributed with mean 18 and standard deviation 6. A particular engineering college will only accept high school seniors with ACT math scores in the top 15%. What is the minimum ACT math score that will be accepted?
Answer by stanbon(75887) About Me  (Show Source):
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The ACT exam math section scores are normally distributed with mean 18 and standard deviation 6. A particular engineering college will only accept high school seniors with ACT math scores in the top 15%. What is the minimum ACT math score that will be accepted?
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z-score withe a right tail of 15%: invNorm(0.85) = 1.0364
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x = zs+u
x = 1.0364*6 + 18
x = 24.22 (minimum scoree accepted)
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Cheers,
Stan H.