Talk:Discrete probability distribution
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- ...its range consists entirely of point-masses. Let X be a random variable; then a "point-mass" in the range of X is a value x such that . If the sum of all such point-masses is 1, then X is a discrete random variable.
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Definition of point-mass is not clear. Is a point mass a probability or a value in the range of X? AxelBoldt 06:40 Jan 9, 2003 (UTC)