Cumulative distribution function: Difference between revisions

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{{refimprove|date=March 2010}}
 
[[File:Exponential distribution cdf.png|thumb|300px|Cumulative distribution function. Hi ud for the [[exponential distribution]]]]
[[File:Normal Distribution CDF.svg|thumb|300px|Cumulative distribution function forughffvf CFC gffor the [[normal distribution]]]]
 
In [[probability theory]] and [[statistics]], the '''cumulative distribution function''' ('''CDF''') of a real-valued [[random variable]] <math>X</math>, or just '''distribution function''' of <math>X</math>, evaluated at <math>x</math>, is the [[probability]] that <math>X</math> will take a value less than or equal to <math>x</math>.<ref>{{Cite book|url=https://github.com/mml-book/mml-book.github.io|title=Mathematics for Machine Learning|last=Deisenroth,Faisal,Ong|first=Marc Peter,A Aldo, Cheng Soon|publisher=Cambridge University Press|year=2019|isbn=9781108455145|location=|pages=181}}</ref>
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