Simpanan buku dari data 2,5,4,3,6

rataan x = (2+5+4+3+6)/5=20/5=4
varians = (2-4)^2+(5-4)^2+(4-4)^2+(3-4)^2+(6-4)^2 / 5
= (4+1+0+1+4)/4
=10/4
=5/2
simpangan baku = akar 5/2
[tex] = \frac{5}{2} \sqrt{10} [/tex]