probability mass function

probability mass function
A function that gives the relative probability that a discrete random variable is exactly equal to some value

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  • Probability mass function — In probability theory, a probability mass function (abbreviated pmf) is a function that gives the probability that a discrete random variable is exactly equal to some value. A pmf differs from a probability density function (abbreviated pdf) in… …   Wikipedia

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  • Probability theory — is the branch of mathematics concerned with analysis of random phenomena.[1] The central objects of probability theory are random variables, stochastic processes, and events: mathematical abstractions of non deterministic events or measured… …   Wikipedia

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  • Probability vector — In mathematics and statistics, a probability vector or stochastic vector is a vector with non negative entries that add up to one.The positions (indices) of a probability vector represent the possible outcomes of a discrete random variable, and… …   Wikipedia

  • Notation in probability and statistics — Probability theory and statistics has some commonly used conventions of its own, in addition to standard mathematical notation and mathematical symbols. Contents 1 Probability theory 2 Statistics 3 Critical values …   Wikipedia

  • probability theory — Math., Statistics. the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events. Cf. probability (def. 4). [1830 40] * * * Branch of mathematics that deals with analysis of random events.… …   Universalium

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