59 lines
1.1 KiB
Markdown
59 lines
1.1 KiB
Markdown
---
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title: 隨機變數 (Random Variable)
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description:
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published: true
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date: 2025-12-28T17:19:30.971Z
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tags:
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editor: markdown
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dateCreated: 2025-12-28T16:41:51.938Z
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---
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## Discrete
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### Probability Mass Function (PMF)
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A set of probability value **p~i~** assigned to each of the values taken by the discrete random variables **x~i~**.
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and
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Probability
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Expectation
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### Cumulative Distribution Function (CDF)
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## Continuous
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### Probability Density Function (PDF)
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Probabilistic properties of a continuous random variable.
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Expectation
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### Cumulative Distribution Function (CDF)
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### Symmetric
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If there is a point that,
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Then,
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Is the expectation of this random variable, equal to the point of symmetry.
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### Median and Quantiles
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The middle value of the random variable.
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For median, set p to 0.5.
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### Variance
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A positive quantity that measures the spread of the distribution of the random variable about its mean value.
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Larger values of the variance indicate that the distribution is more spread out.
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Missing superscript or subscript argument |