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docs: update education/statistics/random-variable

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phidias
2025-12-28 17:09:50 +00:00
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education/statistics/random-variable.md
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@@ -2,7 +2,7 @@
title: 隨機變數 (Random Variable)
description:
published: true
date: 2025-12-28T17:02:16.122Z
date: 2025-12-28T17:09:49.339Z
tags:
editor: markdown
dateCreated: 2025-12-28T16:41:51.938Z
@@ -27,5 +27,12 @@ $F(X) = \sum_{y : y \leq x} P(X = y)$
## Continuous
### Probability Density Function (PDF)
Probabilistic properties of a continuous random variable.
$\int f(x) \,dx\ = 1$
### Cumulative Distribution Function (CDF)
$F(X) = P(X \leq x) = \int_{-\infty}^{x} f(y) \,dy\\$
### Cumulative Distribution Function (CDF)