Let the probability mass function (p.m.f.) of a random variable X be P(X = x) = 4Cx(59)x×(49)4-x, for x = 0, 1, 2, 3, 4 then E(X) is equal to ______. - Mathematics and Statistics | Shaalaa.com
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Answered: Suppose X is a discrete random variable with pmf defined as p(x) = log10 fo x = {1,2,3,...9} Prove that p(x) is a legitimate pmf. | bartleby
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SOLVED: 3. Consider a discrete random variable X that can take on five values 1, 2, 3, 4, 5. A proposed probability mass function (pmf) is given below with an unknown parameter a. (30 points)(a) Find the value of a that makes this a valid pmf.(b) What is the expected value of X?(c) What is the variance of X?
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