Statistics 简明教程
Statistics - Beta Distribution
Beta 分布表示连续概率分布,该分布由两个正形状参数化,$ \alpha $ 和 $ \beta $,这两个正形状参数作为随机变量 x 的指数出现,并控制分布的形状。
The beta distribution represents continuous probability distribution parametrized by two positive shape parameters, $ \alpha $ and $ \beta $, which appear as exponents of the random variable x and control the shape of the distribution.

Probability density function
Beta 分布的概率密度函数给出如下:
Probability density function of Beta distribution is given as:
Formula
其中——
Where −
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${ \alpha, \beta }$ = shape parameters.
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${a, b}$ = upper and lower bounds.
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${B(\alpha,\beta)}$ = Beta function.