Question $3$

Please run the following codes

set.seed$(815)$

$x=$rnorm$(1000)$

Now, compute the variance of vector $x$

Round up your answer $($e$.$g$.,3\mathrm{.}224).$ Please note that the

correct answer is specified in "range" so don't worry

about rounding errors.

Question $4$

Please run the following code

set.seed$(815)$

vector$1=$ sample$(1$:$10,9,$replace$=$TRUE$)$

vector$2=$ sample$(1$:$10,9,$replace $=$ TRUE

please answer both questions