Given the sample 14, 2, 10, 11, 5, 6, 6, 8, 5, 7, find the following. (Round your answers to two decimal places.)
(a) Variance $s^2$ using formula below
$s^2 = \frac{\sum (x - \bar{x})^2}{n - 1}$
s$^2$ = 8.93
(b) Variance $s^2$ using formula below
$s^2 = \frac{\sum x^2 - \frac{(\sum x)^2}{n}}{n - 1}$
s$^2$ = 8.93
(c) Standard deviation, s
s = 2.99