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Unformatted text preview: with a positive test result is actually a drug user? Problem 3 A random variable has p. d. f. f defined by Find the c. d. f. of X . Problem 4 A pair of random variables X and Y have joint p. d. f. Find the marginal p. d. f. of X . Problem 5 Suppose a random variable has p. d. f. f defined by Find the p. d. f. of the random variable Y = X 3 . Charles Geyer 19980925...
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 Spring '02
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 Probability

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