Mathematics, 23.12.2020 02:10 portielesc

Let X be the percentage score on a college-entrance exam for students who did not participate in an exam-preparation seminar. X is modeled by a uniform distribution on [a,100]. Let Y be the percentage score on a college-entrance exam for students who did participate in an exam-preparation seminar. Y is modeled by a uniform distribution on [1.25a,100]. It is given that E[X2]=19,6003. Calculate the 80th percentile of Y.

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Let X be the percentage score on a college-entrance exam for students who did not participate in an...