Compute the Variance and Standard Deviation of a Discrete Random $x$

Short Answer

Compute the Variance and Standard Deviation of a Discrete Random Variable
-From the probability distribution, find the mean and standard deviation for the random variable $x$ , which represents the number of bicycles per household in a town of 1000 households.
$\begin{array}{c|c}\mathrm{x} & \mathrm{P}(\mathrm{x}) \\\hline 0 & 0.125 \\1 & 0.428 \\2 & 0.256 \\3 & 0.108 \\4 & 0.083\end{array}$