Calculate the Standard Deviation of X for the Probability Distribution $$\begin{array} { | c | c | c | c | c | } \hline x & 1 & 2 & 3 & 4 \\\hline P ( X = x ) & 0.1 & 0.4 & 0.2 & 0.3 \\\hline\end{array}$$

Short Answer

Calculate the standard deviation of X for the probability distribution. Round your answer to the whole number. $$\begin{array} { | c | c | c | c | c | } \hline x & 1 & 2 & 3 & 4 \\\hline P ( X = x ) & 0.1 & 0.4 & 0.2 & 0.3 \\\hline\end{array}$$ ​ $$\sigma =$$ __________