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4. Let X be a random variable with distribution P( x =-2) = 1 /2 P(X = 3) = 1/3, P(X = a) = 1/6· , Find the value a that minimizes the variance of X t Dato vorrorelineg he nmher of onidente on n proceineg Cor tho ware 9000 9001 010 rn
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