Answer
$4.09\,m.$
Work Step by Step
The sample standard deviation has the same units of measure as the data items in the sample (meters).
It is calculated as the square root of the sample variance (which we have computed in part b.)
It can also be obtained by invoking the "Descriptive Statistics" option of our Data Analysis feature to obtain a summary shown below in the attached screen snippet.
The sample standard deviation is $4.09\, m.$
