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probability density function

noun, Statistics.
1.
a function of a continuous variable whose integral over a region gives the probability that a random variable falls within the region.
2.
Also called frequency function. a function of a discrete variable whose sum over a discrete set gives the probability of occurrence of a specified value.
Origin
1935-1940
1935-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for probability density function

probability density function

noun
1.
(statistics) a function representing the relative distribution of frequency of a continuous random variable from which parameters such as its mean and variance can be derived and having the property that its integral from a to b is the probability that the variable lies in this interval. Its graph is the limiting case of a histogram as the amount of data increases and the class intervals decrease in size Also called density function Compare cumulative distribution function, frequency distribution
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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