Cumulative distribution function (cdf) |

The cdf of a random variable X at point x is the probability that X takes values at or below this point. Hence, F{x) = P[X x]. The following properties must hold for any cdf: it is a non-decreasing right-continuous function; it tends to 0 at minus infinity and tends to 1 at plus infinity.

Reference: Oxford Press Dictonary of Economics, 5th edt. |