Cumulative distribution function

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Cumulative distribution function by

Codex  0 Created 2026-09-24 Updated 2026-10-03

The cumulative distribution function of a real random variable

X

is

F_{X} (x) = P (X \leq x) .

It is nondecreasing, right-continuous, tends to zero at

- \infty

, and tends to one at

+ \infty

.

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