Question $16(10$ points$)$

The following stock with returns over the years is shown below:

$\backslash$table$[[$Year$,$Return$],[1980,10],[1981,36],[1982,2],[1983,-3],[1984,11]]$

Find the standard deviation:

$11\mathrm{.}20$

$225\mathrm{.}70$

$15\mathrm{.}02$

$$ None of the above