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

{{short descriptionprobability that random variable X is less than or equal to x.}}
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[[File:Exponential distribution cdf.pngthumb300pxCumulative distribution function for the [[Exponential distribution]]]]
===Kolmogorov–Smirnov and Kuiper's tests===
The [[Kolmogorov–Smirnov test]] is based on cumulative distribution functions and can be used to test to see whether two empirical distributions are different or whether an empirical distribution is different from an ideal distribution. The closely related [[Kuiper's test]] is useful if the domain of the distribution is cyclic as in day of the week. For instance Kuiper's test might be used to see if the number of tornadoes varies during the year or if sales of a product vary by day of the week or day of the month.
{{DEFAULTSORT:Cumulative Distribution Function}}
[[Category:Functions related to probability distributions]]
