• Statistical Reference Guide
• Distribution
• Continuous distributions
• Frequency distribution

Cumulative distribution function plot

A cumulative distribution function (CDF) plot shows the empirical cumulative distribution function of the data.

The empirical CDF is the proportion of values less than or equal to X. It is an increasing step function that has a vertical jump of 1/N at each value of X equal to an observed value. CDF plots are useful for comparing the distribution of different sets of data.