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docs: update education/statistics/random-variable

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2025-12-28 19:13:55 +00:00
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education/statistics/random-variable.html
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title: 隨機變數 (Random Variable)
description:
published: true
date: 2025-12-28T17:34:08.898Z
date: 2025-12-28T19:13:54.913Z
tags:
editor: ckeditor
dateCreated: 2025-12-28T16:41:51.938Z
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<h3><span style="font-family:Arial, Helvetica, sans-serif;">Probability Mass Function (PMF)</span></h3>
<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><strong>0 ≤ p<sub>i</sub> ≤ 1 and ∑ p<sub>i</sub> = 1</strong></p>
<p><span style="font-family:Arial, Helvetica, sans-serif;">Probability</span><br>&nbsp;</p>
<p><span style="font-family:Arial, Helvetica, sans-serif;">Probability</span><br>&nbsp;$$\leq$$</p>
<p><span style="font-family:Arial, Helvetica, sans-serif;">Expectation</span><br>&nbsp;</p>
<h3><span style="font-family:Arial, Helvetica, sans-serif;">Cumulative Distribution Function (CDF)</span></h3>
<p><br>&nbsp;</p>