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The variance of the distribution of a discrete random variable is the variance of all possible values of the random variable the sum of the

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The variance of the distribution of a discrete random variable is the variance of all possible values of the random variable the sum of the squared deviations from the mean for each possible value of the random variable the sum of the probabilities of the possible values of the random variable the sum of the product of the squared deviation from the mean for each possible value of the random variable and its probability

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