simpangan baku dari data 7,3,4,6,5 adalah

x = 7+3+4+6+5/5 = 5
(xi-x) => (7-5) = 2 = (2)^2 = 4
(3-5) = -2 = (-2)^2 = 4
(4-5) = -1 = (-1)^2 = 1
(6-5) = 1 = (1)^2 = 1
(5-4) = 1 = (1)^2 = 1
# 4+4+1+1+1 = 11
# s = √1/5 (11) = √11/5