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(Confusing and uncited assertion that continuous CDFs are always logistic removed.) 

{{refimprovedate=March 2019}}
In [[probability theory]] and [[statistics]], the '''cumulative distribution function''' ('''CDF''') of a realvalued [[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>.
In the case of a scalar [[continuous distribution]], it gives the area under the [[probability density function]] from minus infinity to <math>x</math>
==Definition==

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