Use the dataset below to answer this question.

Sales and forecast information for eight periods

Period

Sales

Forecast

$1$

$360$

$382$

$2$

$389$

$379$

$3$

$410$

$380$

$4$

$381$

$381$

$5$

$368$

$381$

$6$

$374$

$379$

$7$

$378$

$8$

$377$

What is the Standard Deviation? Choose the closest answer.

Group of answer choices

$100$

$0$

$34$

$1\mathrm{.}25$

$16$