Programmers Quickie
Statistics Cdf Pmf
The PMF is one way to describe the distribution of a discrete random variable. ... The cumulative distribution function (CDF) of random variable X is defined as FX(x)=P(X≤x), for all x∈R. Note that the subscript X indicates that this is the CDF of the random variable X. Also, note that the CDF is defined for all x∈R.