The standard deviation is the square root of the variance. In this case the variance is:
[tex]\sigma^2=815367.8[/tex]
So to find the standard deviation we need to take the square root of both sides.
[tex]\begin{gathered} \sqrt[]{\sigma^2}=\sqrt[]{815367.8} \\ \sigma=903 \end{gathered}[/tex]
The standard deviation is approximately 903.
