Answer:
The standard deviation is 5.83 kg
Explanation:
Variance and Standard Deviation
Given a data set of random values, the variance is defined as the average of the squared differences from the mean. We use this formula to calculate the variance:

Where
is the mean of the values xi (i=1 to n), n the total number of values.
The standard deviation is known by the symbol
and is the square root of the variance.
We are given the value of the variance:

We now compute the standard deviation

The standard deviation is 5.83 kg