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Additional
probability mass function
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Probability mass function
In
probability theory
and
statistics
, a
probability mass function
(
pmf
) is a function that gives the probability that a
discrete
random variable
is exactly equal to some value. The probability mass function is often the primary means of defining a
discrete probability distribution
, and such functions exist for either
scalar
or
multivariate random variables
whose
domain
is discrete.
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