Simpangan baku dari 5,6,6,8,8,9 adlh

Rata - rata = 42 / 6 = 7

Simpangan Baku :

 [tex] = \sqrt\frac{(5-7)^2+(6-7)^2+(6-7)^2+(8-7)^2+(8-7)^2+(9-7)^2}6 = \sqrt\frac{4+1+1+1+1+4}6 = \sqrt\frac{4+1+1+1+1+4}6 = \sqrt\frac{12}6 = \sqrt{2} [/tex]