This is documentation for an old release of SciPy (version 0.17.0). Read this page Search for this page in the documentation of the latest stable release (version 1.15.1).

Bernoulli Distribution

A Bernoulli random variable of parameter $p$ takes one of only two values $X=0$ or $X=1$ . The probability of success ( $X=1$ ) is $p$ , and the probability of failure ( $X=0$ ) is $1-p.$ It can be thought of as a binomial random variable with $n=1$ . The PMF is $p\left(k\right)=0$ for $k\neq0,1$ and

$$\begin{eqnarray*} p\left(k;p\right) & = & \begin{cases} 1-p & k=0\\ p & k=1\end{cases}\\ F\left(x;p\right) & = & \begin{cases} 0 & x<0\\ 1-p & 0\le x<1\\ 1 & 1\leq x\end{cases}\\ G\left(q;p\right) & = & \begin{cases} 0 & 0\leq q<1-p\\ 1 & 1-p\leq q\leq1\end{cases}\\ \mu & = & p\\ \mu_{2} & = & p\left(1-p\right)\\ \gamma_{3} & = & \frac{1-2p}{\sqrt{p\left(1-p\right)}}\\ \gamma_{4} & = & \frac{1-6p\left(1-p\right)}{p\left(1-p\right)} \end{eqnarray*}$$

$$M\left(t\right) = 1-p\left(1-e^{t}\right)$$

$$\mu_{m}^{\prime}=p$$

$$h\left[X\right]=p\log p+\left(1-p\right)\log\left(1-p\right)$$

Implementation: scipy.stats.bernoulli