Книга: Probability Density Function: Probability Theory, Random Variable, Function, Probability Distribution, Cumulative Distribution Function, Probability Mass Function

High Quality Content by WIKIPEDIA articles! In probability theory, a probability density function (abbreviated as pdf, or just density) of a continuous random variable is a function that describes the relative likelihood for this random variable to occur at a given point in the observation space. The probability of a random variable falling within a given set is given by the integral of its density over the set.On rare occasions the term ?probability distribution function? is used to denote the probability density function. However special care should be taken around this term, since in other sources the ?probability distribution function? may refer to either the probability distribution function, or the cumulative distribution function, or may be a probability mass function rather than a density.