(of any random variable) the function that assigns to each number the probability that the random variable takes a value less than or equal to the given number.
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Origin of distribution function
First recorded in 1905–10
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British Dictionary definitions for distribution function
short for cumulative distribution function
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