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Asked Oct 25, 2019
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The College Board National Office recently reported that in 2011-2012, the547,038 high school juniors who took the ACT achieved a mean score of 530 with a standard deviation of 123 on the mathematics portion of the test. Assume these test scores are normally distributed.

d. How high does a student have to score to be in the top 10% of the high school juniors on the mathematical portion of the test?

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Population mean(u)=530 Population standard deviation(o) = 123 Consider that X is random variable defined as high school juniors' score in the mathematics portion of the test

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