distribution function
A mathematical term used in probability and statistics to describe the probability that a random variable takes a value less than or equal to a given point.
The distribution function of the normal distribution is also called the cumulative distribution function.
確率密度関数 is the probability density function, which is the derivative of the distribution function for continuous random variables.
cumulative distribution function
Compound of 分布 (distribution) and 関数 (function).