Calculate the Standard Deviation of X for the Probability Distribution $$\begin{array} { | c | c | c | c | c | } \hline x & 2 & 4 & 3 & 5 \\\hline P ( X = x ) & 0.3 & 0.1 & 0.2 & 0.4 \\\hline\end{array}$$

Short Answer

Calculate the standard deviation of X for the probability distribution. $$\begin{array} { | c | c | c | c | c | } \hline x & 2 & 4 & 3 & 5 \\\hline P ( X = x ) & 0.3 & 0.1 & 0.2 & 0.4 \\\hline\end{array}$$ ​
Round your answer to two decimal places.
​ $$\sigma =$$ __________