 ##  [Empirical Cumulative Distribution Function](/empirical-cumulative-distribution-function) 

  ##  [Empirical Cumulative Distribution Function](https://natural.quantumdictionary.io/empirical-cumulative-distribution-function-0) 

  
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**Natural &amp; Formal Sciences Dictionary**

 
Definition

The step function that assigns to each real value x the fraction of sample observations less than or equal to x; a nonparametric estimator of the underlying cumulative distribution.