1.1 KiB
1.1 KiB
title, description, published, date, tags, editor, dateCreated
| title | description | published | date | tags | editor | dateCreated |
|---|---|---|---|---|---|---|
| 隨機變數 (Random Variable) | true | 2025-12-28T19:20:34.516Z | markdown | 2025-12-28T16:41:51.938Z |
Discrete
Probability Mass Function (PMF)
A set of probability value pi assigned to each of the values taken by the discrete random variables xi.
0 ≤ pi ≤ 1 and ∑ pi = 1
Probability
\leq
Expectation
Cumulative Distribution Function (CDF)
Continuous
Probability Density Function (PDF)
Probabilistic properties of a continuous random variable.
Expectation
Cumulative Distribution Function (CDF)
Symmetric
If there is a point that,
Then,
Is the expectation of this random variable, equal to the point of symmetry.
Median and Quantiles
The middle value of the random variable.
For median, set p to 0.5.
Variance
A positive quantity that measures the spread of the distribution of the random variable about its mean value.
Larger values of the variance indicate that the distribution is more spread out.