From the Probability Distribution, Find the Mean and Standard Deviation

Short Answer

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