docs: update education/statistics/random-variable

education/statistics/random-variable.html

@@ -2,7 +2,7 @@
 title: 隨機變數 (Random Variable)
 description: 
 published: true
-date: 2025-12-28T16:48:42.180Z
+date: 2025-12-28T16:54:18.069Z
 tags: 
 editor: ckeditor
 dateCreated: 2025-12-28T16:41:51.938Z
@@ -10,11 +10,11 @@ dateCreated: 2025-12-28T16:41:51.938Z
 
 <h2><span style="font-family:Arial, Helvetica, sans-serif;">Discrete</span></h2>
 <h3><span style="font-family:Arial, Helvetica, sans-serif;">Probability Mass Function (PMF)</span></h3>
-<p>&nbsp;</p>
+<p><span style="font-family:Arial, Helvetica, sans-serif;">A set of probability value <strong>p<sub>i</sub></strong> assigned to each of the values taken by the discrete random variables <strong>x<sub>i</sub></strong>.</span></p>
 <p>&nbsp;</p>
 <h3><span style="font-family:Arial, Helvetica, sans-serif;">Cumulative Distribution Function (CDF)</span></h3>
 <p>&nbsp;</p>
-<h2>Continuous</h2>
+<h2><span style="font-family:Arial, Helvetica, sans-serif;">Continuous</span></h2>
 <h3><span style="font-family:Arial, Helvetica, sans-serif;">Probability Density Function (PDF)</span></h3>
 <p>&nbsp;</p>
 <p>&nbsp;</p>

education/statistics/random-variable.md

@@ -0,0 +1,23 @@
+---
+title: 隨機變數 (Random Variable)
+description: 
+published: true
+date: 2025-12-28T16:54:25.985Z
+tags: 
+editor: markdown
+dateCreated: 2025-12-28T16:41:51.938Z
+---
+
+## Discrete
+
+### Probability Mass Function (PMF)
+
+A set of probability value **p~i~** assigned to each of the values taken by the discrete random variables **x~i~**.
+
+### Cumulative Distribution Function (CDF)
+
+## Continuous
+
+### Probability Density Function (PDF)
+
+### Cumulative Distribution Function (CDF)