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need help, please an exponential distrib mean 2. Find (a) the un nconditional probability function for Y, (b) ELY], (c) V(Y). Ans. (a) p(y) (

need help, please
an exponential distrib mean 2. Find (a) the un nconditional probability function for Y, (b) ELY], (c) V(Y). Ans. (a) p(y) ( 1)2 3 1! 7. = 0, 1, 2, 3, (b) 2 (c) 6 11. If Z has a standard normal distribution, find the probability density function for U - Z and identify the distribution. - 4/2 Ans. fu (u) V27U' u > 0, U- has a chi-square distribution with 1 degree of freedom

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