\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Courses
About
Login
Register
If \(X\) has standard deviation \(\sigma\), what is the standard deviation of the sum \(S_n\) of \(n\) independent variables identically distributed as \(X\)?
\(n\sigma\)
\(\dfrac{\sigma}{n}\)
\(\sigma\sqrt{n}\)
Exit