Consider the following sample data values.

$12$

$16$

$11$

$4$

$14$

$3$

$18$

$2$

a$)$ Calculate the range.

b$)$ Calculate the sample variance.

c$)$ Calculate the sample standard deviation.

a$)$ The range is

b$)$ The sample variance is

$($Round to two decimal places as needed.$)$

c$)$ The sample standard deviation is

$($Round to two decimal places as needed.$)$