$\"\"$

\

The statement is $\"\"$ .

\

The mean formula is $\"\"$ , Where n is number of given values.

\

Find the mean:

\

Apply mean formula $\"\"$ .

\

$\"\"$

\

$\"\"$ (Add: $\"\"$ )

\

$\"\"$ (Divide: $\"\"$ ) $\"\"$

\

The variance formula is $\"\"$ , Where $\"\"$ is mean value.

\

Find the variance:

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ (Add: $\"\"$ )

\

$\"\"$ (Divide: $\"\"$ ) $\"\"$

\

The standard deviation formula is $\"\"$ , Where $\"\"$ is mean value.

\

Find the standard deviation:

\

$\"\"$

\

$\"\"$ . (Take square root each side) $\"\"$

\

The variance is 40, standard deviation 6.32.