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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 1998-09-25...
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- Spring '02